{"id":45284,"date":"2023-10-18T16:36:00","date_gmt":"2023-06-08T16:44:43","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45284-2\/"},"modified":"2024-05-04T04:53:05","modified_gmt":"2024-05-03T20:53:05","slug":"45284-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45284-2\/","title":{"rendered":""},"content":{"rendered":"<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6700\u8fd1Rust\u306b\u5165\u9580\u3057\u59cb\u3081\u305f\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u66f8\u304d\u65b9\u306e\u57fa\u672c\u7684\u306a\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u306b\u3064\u3044\u3066\u5fa9\u7fd2\u3092\u517c\u306d\u3066\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4eca\u307e\u3067Python\u306a\u3069\u3092\u4f7f\u3046\u3053\u3068\u304c\u591a\u304b\u3063\u305f\u306e\u3067\u3001Python\u7b49\u3068\u306e\u6bd4\u8f03\u3082\u3042\u308b\u7a0b\u5ea6\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u521d\u5fc3\u8005\u3067\u3059\u3002\u305d\u306e\u70b9\u306f\u3054\u7559\u610f\u304f\u3060\u3055\u3044\u3002<\/ul>\n<h1>\u4f7f\u3046\u3082\u306e<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Windows10<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">VS Code<\/ul>\n<h1>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[1]. Install Rust\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[2]. Rust\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3084\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u306a\u3069\u3092\u6271\u3046rustup\u3068\u3044\u3046\u3082\u306e\u3092\u4f7f\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[3]. \u4eca\u56de\u306f64-bit\u306eWindows\u306a\u306e\u3067\u3001\u300cDOWNLOAD RUSTUP-INIT.EXE (64-BIT)\u300d\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u203bmacOS\u3084Linux\u3092\u304a\u4f7f\u3044\u306e\u65b9\u306f\u5225\u306e\u30b3\u30de\u30f3\u30c9\u306a\u3069\u306e\u5bfe\u5fdc\u3068\u306a\u308b\u306e\u3067\u3001\u30ea\u30f3\u30af\u5148\u306e\u8aac\u660e\u306a\u3069\u306b\u5408\u308f\u305b\u3066\u3054\u5bfe\u5fdc\u304f\u3060\u3055\u3044\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5df737434c4406cf36b7\/5-0.png\" alt=\"image.png\" \/><\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[4]. \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305fexe\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30d6\u30eb\u30af\u30ea\u30c3\u30af\u3057\u3066\u8d77\u52d5\u3059\u308b\u3068\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u304c\u8d77\u52d5\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u304c\u958b\u59cb\u3055\u308c\u307e\u3059\u3002\u5b8c\u4e86\u3057\u3066\u30a8\u30f3\u30bf\u30fc\u3092\u62bc\u3059\u3068\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u304c\u9589\u3058\u308b\u306e\u3067\u3001\u5225\u9014\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3084PowerShell\u306a\u3069\u3092\u8d77\u52d5\u3059\u308b\u3068rust\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u203b\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u4e8b\u524d\u306bVisual Studio C++ Build tools\u304c\u5fc5\u8981\u306b\u306a\u308b\u3088\u3046\u3067\u3059\uff08\u79c1\u306e\u74b0\u5883\u3067\u306f\u65e2\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u6e08\u307f\u3060\u3063\u305f\u306e\u304b\u3001\u7279\u306b\u6c17\u306b\u305b\u305a\u306b\u9032\u3093\u3060\u306e\u3067\u672c\u8a18\u4e8b\u3067\u306f\u5272\u611b\u3057\u307e\u3059\uff09\u3002<\/p>\n<p>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5b8c\u4e86\u5f8c\u3001\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u306a\u3069\u306e\u30bf\u30fc\u30df\u30ca\u30eb\u4e0a\u3067rustup\u3084rustc\u3092\u5229\u7528\u3067\u304d\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30d8\u30eb\u30d7\u3092\u8868\u793a\u3057\u3066\u307f\u3066\u3001\u8a8d\u8b58\u3057\u3066\u304f\u308c\u308c\u3070OK\u3067\u3059\u3002\u3082\u3057\u8a8d\u8b58\u3057\u3066\u304f\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u6b63\u5e38\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u304c\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f\u308aPATH\u304c\u901a\u3063\u3066\u3044\u306a\u3044\u306a\u3069\u306e\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff08\u79c1\u306e\u5834\u5408\u306f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3067\u305d\u306e\u307e\u307ePATH\u304c\u8a2d\u5b9a\u3055\u308c\u307e\u3057\u305f\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rustup --help\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>rustup 1.22.1 (b01adbbc3 2020-07-08)\r\nThe Rust toolchain installer\r\n\r\nUSAGE:\r\n    rustup.exe [FLAGS] [+toolchain] &lt;SUBCOMMAND&gt;\r\n...\r\n<\/code><\/pre>\n<p>rustc\u306fRust\u306e\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002rustup\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3067\u540c\u6642\u306b\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rustc --help\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>Usage: rustc [OPTIONS] INPUT\r\n\r\nOptions:\r\n    -h, --help          Display this message\r\n        --cfg SPEC      Configure the compilation environment\r\n...\r\n<\/code><\/pre>\n<h1>cargo\u306e\u6982\u8981\u3068\u78ba\u8a8d<\/h1>\n<p>cargo\u306fRust\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u7ba1\u7406\u306a\u3069\u3092\u6271\u3046\u30c4\u30fc\u30eb\u3067\u3059\u3002\u524d\u8ff0\u306erustup\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u5834\u5408\u6700\u521d\u304b\u3089\u5165\u3063\u3066\u3044\u307e\u3059\u3002Python\u3067\u8a00\u3046\u3068pip\u3084poetry\u30e9\u30a4\u30d6\u30e9\u30ea\u307f\u305f\u3044\u306a\u90e8\u5206\u3092\u62c5\u5f53\u3057\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067cargo\u304c\u5165\u3063\u3066\u3044\u308b\u3053\u3068\u3084\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cargo --version\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>cargo 1.48.0 (65cbdd2dc 2020-10-14)\r\n<\/code><\/pre>\n<h1>cargo\u3067\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308b<\/h1>\n<p>$ cargo new &lt;\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d&gt;\u3068\u3044\u3046\u30b3\u30de\u30f3\u30c9\u3067\u65b0\u3057\u3044Rust\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u76f4\u4e0b\u306b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\u3067\u6307\u5b9a\u3057\u305f\u540d\u524d\u306e\u30d5\u30a9\u30eb\u30c0\u304c\u4f5c\u6210\u3055\u308c\u308b\u306e\u3067\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u305f\u3044\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4e8b\u524d\u306bcd\u30b3\u30de\u30f3\u30c9\u306a\u3069\u3067\u79fb\u52d5\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u30c6\u30c3\u30af\u30d6\u30ed\u30b0\u8a18\u4e8b\u57f7\u7b46\u7528\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306a\u306e\u3067\u3001blog_rust\u3068\u3044\u3046\u540d\u524d\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cargo new blog_rust\r\n<\/code><\/pre>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u306a\u3069\u306f\u8a72\u5f53\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30d5\u30a9\u30eb\u30c0\u5185\u306b\u79fb\u52d5\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u306e\u3067\u79fb\u52d5\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cd blog_rust\r\n<\/code><\/pre>\n<p>$ dir\u3082\u3057\u304f\u306f$ ls\u30b3\u30de\u30f3\u30c9\u3067\u5185\u5bb9\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u751f\u6210\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Mode                LastWriteTime         Length Name\r\n----                -------------         ------ ----\r\nd-----       2020\/12\/10      8:53                src\r\nd-----       2020\/12\/10      8:54                target\r\n-a----       2020\/12\/10      8:54            140 Cargo.lock\r\n-a----       2020\/12\/10      8:53            222 Cargo.toml\r\n<\/code><\/pre>\n<p>\u203btarget\u30d5\u30a9\u30eb\u30c0\u3084Cargo.lock\u30d5\u30a1\u30a4\u30eb\u306f\u6700\u521d\u306f\u7121\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u306a\u3069\u3059\u308b\u3068\u51fa\u73fe\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">src\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304c\u914d\u7f6e\u3055\u308c\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u76f4\u5f8c\u3067\u306fmain.rs\u3068\u3044\u3046\u3001\u30b3\u30fc\u30c9\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3068\u306a\u308b\u30d5\u30a1\u30a4\u30eb\u306e\u307f\u751f\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">target\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u7d50\u679c\u306e\u30d0\u30a4\u30ca\u30ea\u3084\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u304c\u683c\u7d0d\u3055\u308c\u308b\u30d5\u30a9\u30eb\u30c0\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Cargo.lock\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30bd\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306a\u3069\u306e\u5236\u5fa1\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Cargo.toml\u306f\u5229\u7528\u3055\u308c\u308bRust\u30d0\u30fc\u30b8\u30e7\u30f3\u3084\u4f9d\u5b58\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a\u306a\u3069\u306b\u4f7f\u3044\u307e\u3059\u3002Python\u3067\u8a00\u3048\u3070requirements.txt\u3084poetry\u3067\u751f\u6210\u3055\u308c\u308bdependencies\u306e\u6307\u5b9a\u7528\u306e\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/ul>\n<h1>main.rs \u306e\u4e2d\u3092\u78ba\u8a8d\u3057\u3066\u307f\u308b<\/h1>\n<p>cargo new\u30b3\u30de\u30f3\u30c9\u306b\u3088\u308b\u65b0\u3057\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u5f8c\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u308bsrc\/main.rs\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8997\u3044\u3066\u307f\u307e\u3059\uff08Rust\u306e\u30b3\u30fc\u30c9\u306e\u62e1\u5f35\u5b50\u306f.rs\u306b\u306a\u308a\u307e\u3059\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello, world!\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e2d\u8eab\u306f\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3001Hello, world!\u306e\u8a18\u8ff0\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>fn\u306f\u95a2\u6570\u5b9a\u7fa9\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3001Python\u306edef\u3084js\u306efunction\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n<p>main\u95a2\u6570\u306f\u30b3\u30fc\u30c9\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\uff08\u30d3\u30eb\u30c9\u5f8c\u306e\u3082\u306e\u3092\u5b9f\u884c\u3057\u305f\u969b\u306b\u6700\u521d\u306b\u5b9f\u884c\u3055\u308c\u308b\u95a2\u6570\uff09\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>println!\u306f\u30b3\u30f3\u30bd\u30fc\u30eb\u51fa\u529b\u7528\u306e\u95a2\u6570\uff08\u30de\u30af\u30ed\uff09\u3067\u3059\u3002Python\u3067\u3044\u3046\u3068\u3053\u308d\u306eprint\u95a2\u6570\u3001js\u3067\u8a00\u3046\u3068\u3053\u308d\u306econsole.log\u306a\u3069\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002Rust\u306e\u30de\u30af\u30ed\u95a2\u4fc2\u306f\u307e\u3060\u305d\u3053\u307e\u3067\u52c9\u5f37\u3067\u304d\u3066\u3044\u306a\u3044\u306e\u3067\u3001\u52c9\u5f37\u304c\u9032\u3093\u3060\u3089\u5c06\u6765\u6a5f\u4f1a\u304c\u3042\u308c\u3070\u5225\u306e\u8a18\u4e8b\u3067\u89e6\u308c\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h1>Rust\u306e\u30b3\u30fc\u30c9\u3092\u30d3\u30eb\u30c9\u3057\u3066Hello, world!\u3057\u3066\u307f\u308b<\/h1>\n<p>\u65e9\u901fmain.rs\u306e\u30b3\u30fc\u30c9\u3092\u30d3\u30eb\u30c9\u3057\u3066Rust\u3067Hello World\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30d3\u30eb\u30c9\u3084\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u306b\u306f\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u306e\u9078\u629e\u80a2\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>$ cargo build\u30b3\u30de\u30f3\u30c9 : \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>$ cargo run\u30b3\u30de\u30f3\u30c9 : \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u3001\u4e14\u3064\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u3082\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>$ cargo check\u30b3\u30de\u30f3\u30c9 : \u30d3\u30eb\u30c9\u304c\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\u304c\u3055\u308c\u307e\u3059\u3002\u30d3\u30eb\u30c9\u3084\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u81ea\u4f53\u306f\u3055\u308c\u307e\u305b\u3093\u30023\u3064\u306e\u4e2d\u3067\u4e00\u756a\u901f\u304f\u7d42\u308f\u308b\u306e\u3067\u3001\u5b9a\u671f\u7684\u306a\u30b3\u30fc\u30c9\u30c1\u30a7\u30c3\u30af\u306a\u3069\u306b\u5411\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u30b3\u30fc\u30c9\u306e\u30d3\u30eb\u30c9\u3068main.rs\u306e\u5b9f\u884c\u3092\u884c\u3044\u305f\u3044\u305f\u3081\u3001$ cargo run\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30de\u30f3\u30c9\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30d5\u30a9\u30eb\u30c0\u76f4\u4e0b\uff08Cargo.toml\u306a\u3069\u304c\u3042\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff09\u3067\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cargo run\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>   Compiling blog_rust v0.1.0 ...\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.82s\r\n     Running `target\\debug\\blog_rust.exe`\r\nHello, world!\r\n<\/code><\/pre>\n<p>\u5b9f\u884c\u3057\u3066\u307f\u308b\u3068\u4e0a\u8a18\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u51fa\u307e\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306a\u3069\u304c\u3042\u308b\u3068\u3053\u3053\u3067\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u30d3\u30eb\u30c9\u304c\u7d42\u308f\u308b\u307e\u3067\u306e\u6642\u9593\u3084\u3001\u30d3\u30eb\u30c9\u3067\u751f\u6210\u3055\u308c\u305fexe\u30d5\u30a1\u30a4\u30eb\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\uff08Linux\u3084macOS\u306a\u3069\u3060\u3068exe\u4ee5\u5916\u306b\u306a\u308a\u307e\u3059\uff09\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u3001Hello, world!\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<h1>VS Code\u306e\u62e1\u5f35\u6a5f\u80fd\u306e\u8a2d\u5b9a<\/h1>\n<p>Rust\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u59cb\u3081\u308b\u524d\u306b\u3001VS Code\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u62e1\u5f35\u6a5f\u80fd\u306b\u95a2\u3057\u3066\u4e8b\u524d\u306b\u5165\u308c\u3066\u304a\u304f\u3068\u4fbf\u5229\u306a\u306e\u3067\u5c11\u3057\u89e6\u308c\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>\u62e1\u5f35\u6a5f\u80fd\u306f\u3068\u308a\u3042\u3048\u305aRust\u81ea\u4f53\u306e\u62e1\u5f35\u6a5f\u80fd\u3068Tabnine\u306e2\u3064\u3092\u5165\u308c\u307e\u3057\u305f\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5df737434c4406cf36b7\/50-0.png\" alt=\"image.png\" \/><\/div>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5df737434c4406cf36b7\/51-0.png\" alt=\"image.png\" \/><\/div>\n<p>Tabnine\u306e\u65b9\u306fRust\u4ee5\u5916\u3082\u542b\u3081\u305f\u6a5f\u68b0\u5b66\u7fd2\u306b\u3088\u308b\u88dc\u5b8c\u304c\u3055\u308c\u307e\u3059\u3002\u884c\u5358\u4f4d\u3067\u306e\u88dc\u5b8c\u3084\u901a\u5e38\u306f\u88dc\u5b8c\u306e\u52b9\u304d\u3065\u3089\u3044\u7b87\u6240\u306e\u88dc\u5b8c\u3001\u305d\u306e\u4ed6\u6587\u5b57\u5217\u306a\u3069\u306e\u88dc\u5b8c\u306a\u3069\u3082\u52b9\u3044\u3066\u4fbf\u5229\u3067\u3059\u3002Python\u3068\u304b\u3060\u3068\u4f3c\u305f\u3088\u3046\u306a\u3082\u306e\u3067Kite\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u4ed6\u306e\u8a00\u8a9e\u3067\u3082\u88dc\u5b8c\u304c\u52b9\u304f\u306e\u3067\u304a\u4ed5\u4e8b\u306ePython\u3067\u3082\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u3068\u3066\u3082\u5feb\u9069\u3067\u3059\u3002<\/p>\n<blockquote><p>Rust\u52c9\u5f37\u3057\u3066\u3044\u3066\u77e5\u3063\u3066\u3001Python\u306e\u304a\u4ed5\u4e8b\u3067\u3082\u6570\u65e5\u524d\u304b\u3089\u4f7f\u3044\u59cb\u3081\u305f\u3093\u3060\u3051\u3069Tabnine\u3063\u3066\u3044\u3068\u3046\u88dc\u5b8c\u306eVS Code\u62e1\u5f35\u4e2d\u3005\u826f\u3044\u3088\uff01Kite\u7684\u306a\u6a5f\u68b0\u5b66\u7fd2\u306e\u88dc\u5b8c\u306f\u6700\u521d\u306f\u7d50\u69cb\u6238\u60d1\u3046\u3051\u3069\u6163\u308c\u305f\u3089\u697d\u3002docstring\u306a\u3069\u307e\u3067\u542b\u3081\u3066\u88dc\u5b8c\u3057\u3066\u304f\u308c\u308b\u3002\u6700\u8fd1\u306fPylance\u30fbKite\u30fbTabnine\u30fbAllAutocomplete\u3067\u5165\u529b\u88dc\u5b8c\u3084\u3063\u3066\u308b\u3002 pic.twitter.com\/xxoNf0noMh\u2014 simonritchie (@simonritchie_sd) November 30, 2020<\/p><\/blockquote>\n<p><script><\/script><\/p>\n<p>\uff08\u8a72\u5f53\u306e\u30c4\u30a4\u30fc\u30c8\u8aa4\u5b57\u304c\u3042\u308a\u307e\u3059\u306d\u30fb\u30fb\u30fb;\uff09<\/p>\n<h1>Rust\u306e\u57fa\u672c\u6587\u6cd5<\/h1>\n<p>\u7121\u4e8bRust\u3067Hello world\u304c\u51fa\u6765\u305f\u306e\u3067\u3001\u5177\u4f53\u7684\u306aRust\u306e\u57fa\u790e\u6587\u6cd5\u306b\u3064\u3044\u3066\u6b21\u306e\u7bc0\u304b\u3089\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\u5909\u6570\u5ba3\u8a00<\/h2>\n<p>Rust\u306e\u5909\u6570\u306flet\u3067\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u5909\u6570\u306e\u5185\u5bb9\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u51fa\u529b<\/h2>\n<p>\u5909\u6570\u306e\u5185\u5bb9\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u51fa\u529b\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u3001println!\u306e\u7b2c\u4e00\u5f15\u6570\u306e\u6587\u5b57\u5217\u5185\u306b{}\u306e\u62ec\u5f27\u3092\u8a18\u8ff0\u3057\u3001\u7b2c\u4e8c\u5f15\u6570\u4ee5\u964d\u306b\u305d\u306e\u5909\u6570\u3092\u6307\u5b9a\u3059\u308b\u3068\u51fa\u529b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cargo run\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>x\u306e\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u8907\u6570\u306e\u5909\u6570\u3092\u51fa\u529b\u3057\u305f\u3044\u5834\u5408\u306f{}\u306e\u62ec\u5f27\u3092\u8907\u6570\u6587\u5b57\u5217\u4e2d\u306b\u8a2d\u5b9a\u3057\u3001\u7b2c\u4e09\u5f15\u6570\u4ee5\u964d\u306b\u9806\u756a\u306b\u6307\u5b9a\u3057\u3066\u3044\u304f\u3068\u5bfe\u5fdc\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x\u306e\u5024\u306f{}\u3001y\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>x\u306e\u5024\u306f10\u3001y\u306e\u5024\u306f20\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>\u5909\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb<\/h2>\n<p>\u6700\u521d\u3073\u3063\u304f\u308a\u3057\u305f\u306e\u3067\u3059\u304c\u3001Rust\u306e\u5909\u6570\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3060\u3068\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08immutable: \u4e0d\u5909\uff09\u3067\u3059\u3002\u3064\u307e\u308a\u518d\u4ee3\u5165\u304c\u3067\u304d\u307e\u305b\u3093\u3002<br \/>\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u518d\u4ee3\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u6012\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error[E0384]: cannot assign twice to immutable variable `x`\r\n --&gt; src\\main.rs:3:5\r\n  |\r\n2 |     let x = 10;\r\n  |         -\r\n  |         |\r\n  |         first assignment to `x`\r\n  |         help: make this binding mutable: `mut x`\r\n3 |     x = 20;\r\n  |     ^^^^^^ cannot assign twice to immutable variable\r\n\r\nerror: aborting due to previous error; 2 warnings emitted\r\n\r\nFor more information about this error, try `rustc --explain E0384`.\r\n<\/code><\/pre>\n<p>\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306b\u3059\u308b\uff08\u5909\u6570\u306e\u5024\u3092\u5909\u66f4\u53ef\u80fd\u306b\u3059\u308b\uff09\u5834\u5408\u306b\u306fmut\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>x\u306e\u5024\u306f20\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>\u6574\u6570\u306e\u5024\u306f\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u8fbc\u307f\u3067\u66f8\u3051\u308b<\/h2>\n<p>Python\u306b\u3082\u540c\u3058\u3088\u3046\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u6574\u6570\u306e\u5024\u306b\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001K\u3084M\u306a\u3069\u306e\u5358\u4f4d\u3067\u306e1000\u3068\u304b100\u4e07\u3068\u304b\u306e\u6841\u304c\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u52d5\u304b\u3057\u305f\u6642\u306b\u306f\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u7121\u3057\u306e\u72b6\u614b\u3067\u6271\u308f\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10_000_000<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>x\u306e\u5024\u306f10000000\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>\u540c\u540d\u306e\u5909\u6570\u306e\u518d\u5ba3\u8a00 : \u30b7\u30e3\u30c9\u30fc\u30a4\u30f3\u30b0<\/h2>\n<p>Rust\u3067\u306f\u540c\u3058\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u3001\u540c\u3058\u540d\u524d\u306e\u5909\u6570\u3092let\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u8907\u6570\u56de\u4f7f\u3046\u3053\u3068\u3067\u518d\u5ba3\u8a00\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306b\u3059\u308b\u305f\u3081\u306emut\u30ad\u30fc\u30ef\u30fc\u30c9\u306a\u3069\u3082\u7701\u7565\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">200<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u540c\u3058\u30b9\u30b3\u30fc\u30d7\u4e2d\u3067\u540c\u540d\u306e\u5909\u6570\u5ba3\u8a00\u3092\u8907\u6570\u56de\u3059\u308b\u3053\u3068\u3092Rust\u3067\u306f\u30b7\u30e3\u30c9\u30fc\u30a4\u30f3\u30b0\uff08Shadowing\uff09\u3068\u547c\u3076\u3088\u3046\u3067\u3059\u3002<\/p>\n<p>\u30b7\u30e3\u30c9\u30fc\u30a4\u30f3\u30b0\u3092\u4f7f\u3046\u3068\u3001\u9014\u4e2d\u304b\u3089\u5909\u6570\u306e\u578b\u3092\u5909\u3048\u3066\u3082\u540c\u3058\u540d\u524d\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u30e6\u30fc\u30b6\u30fc\u306b\u6570\u5b57\u306e\u5165\u529b\u3092\u6c42\u3081\u308b\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3067\u3001\u6700\u521d\u306f\u6587\u5b57\u5217\u3067\u3059\u304c\u5f8c\u3067\u6574\u6570\u306b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u30fb\u30fb\u30fb\u307f\u305f\u3044\u306a\u30b1\u30fc\u30b9\u3067\u5909\u6570\u540d\u3092\u5909\u3048\u306a\u304f\u3066\u6e08\u3080\u306e\u3067\u4fbf\u5229\u306a\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">user_input<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"100\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">user_input<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"n\">user_input<\/span><span class=\"nf\">.parse<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6574\u6570\u5909\u63db\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5165\u529b\u3055\u308c\u305f\u6574\u6570\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">user_input<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5165\u529b\u3055\u308c\u305f\u6574\u6570\u306f100\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u203bparse\u306f\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3055\u308c\u305f\u578b\uff08\u4eca\u56de\u306fi32\u3067\u6574\u6570\uff09\u3078\u5909\u63db\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3001expect\u306f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u7684\u306a\u5fc5\u8981\u306b\u306a\u308b\u51e6\u7406\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u5b9a\u6570\u306e\u5229\u7528<\/h2>\n<p>Rust\u306b\u306fPython\u3068\u7570\u306a\u308a\u3001\u5b9a\u6570\u5b9a\u7fa9\u304c\u5b58\u5728\u3057\u307e\u3059\uff08Python\u3082\u65b0\u3057\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u578b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306eFinal\u3067\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u306f\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u304c\u30fb\u30fb\u30fb\uff09\u3002<\/p>\n<p>\u5b9a\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u306b\u306fconst\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002\u5b9a\u6570\u306e\u5834\u5408\u578b\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\uff08i32\u306a\u3069\uff09\u304c\u5fc5\u9808\u306b\u306a\u308a\u307e\u3059\uff08\u578b\u306b\u95a2\u3057\u3066\u306f\u5f8c\u3005\u306e\u7bc0\u3067\u89e6\u308c\u307e\u3059\uff09\u3002\u307e\u305f\u3001\u5b9a\u6570\u540d\u306f\u4ed6\u306e\u8a00\u8a9e\u3068\u540c\u3058\u3088\u3046\u306b\u5927\u6587\u5b57 + \u5358\u8a9e\u306f\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u533a\u5207\u308a\u3067\u6271\u3046\u306e\u304cRust\u3067\u3082\u4e00\u822c\u7684\u306a\u3088\u3046\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">const<\/span> <span class=\"n\">X_VALUE<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5b9a\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">X_VALUE<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5b9a\u6570\u306e\u5024\u306f100\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u3082\u3061\u308d\u3093\u5b9a\u6570\u306b\u5bfe\u3057\u3066\u518d\u4ee3\u5165\u306a\u3069\u3092\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u6012\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">const<\/span> <span class=\"n\">X_VALUE<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">X_VALUE<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">200<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5b9a\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">X_VALUE<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error[E0070]: invalid left-hand side of assignment\r\n --&gt; src\\main.rs:3:13\r\n  |\r\n3 |     X_VALUE = 200;\r\n  |     ------- ^\r\n  |     |\r\n  |     cannot assign to this expression\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0070`.\r\n<\/code><\/pre>\n<h2>Rust\u3067\u306e\u5909\u6570\u306a\u3069\u3078\u306e\u578b\u306e\u6307\u5b9a<\/h2>\n<p>Rust\u3067\u5909\u6570\u306a\u3069\u306b\u578b\u3092\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u306flet &lt;\u5909\u6570\u540d&gt;: &lt;\u578b\u540d&gt;\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002let\u306e\u90e8\u5206\u306f\u5b9a\u6570\u3067\u3042\u308c\u3070const\u306b\u306a\u308b\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u305d\u308c\u305e\u308c\u3067\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u307032bit\u306e\u6574\u6570\u306e\u578b\uff08i32\uff09\u3067\u3042\u308c\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">int_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6574\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">int_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u304a\u3001Rust\u3067\u306f\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u306f\u578b\u3092\u6307\u5b9a\u305b\u305a\u3068\u3082\u578b\u304c\u63a8\u8ad6\u3055\u308c\u3066\u30d3\u30eb\u30c9\u304c\u901a\u308a\u307e\u3059\u3002\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u3042\u308c\u3070: i32\u90e8\u5206\u3092\u7701\u7565\u3057\u3066\u3082Rust\u5074\u3067\u8a72\u5f53\u306e\u5909\u6570\u306f\u6574\u6570\u578b\u3060\u3068\u5224\u5b9a\u3055\u308c\u3066\u30d3\u30eb\u30c9\u3055\u308c\u307e\u3059\uff08\u578b\u3092\u660e\u793a\u3057\u306a\u3044\u5834\u5408\u3001\u6574\u6570\u3067\u306f32bit\u306e\u6574\u6570\u306b\u306a\u308a\u307e\u3059\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">int_val<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6574\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">int_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30a8\u30c7\u30a3\u30bf\u4e0a\u3067\u30de\u30a6\u30b9\u30aa\u30fc\u30d0\u30fc\u3057\u3066\u3082i32\u3068\u3057\u3066\u8a8d\u8b58\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5df737434c4406cf36b7\/107-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u305f\u3060\u3057\u5b9a\u6570\u306a\u3069\u306f\u578b\u3092\u660e\u793a\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u304b\u3063\u305f\u308a\u3001\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u8fd4\u5374\u5024\u304c\u8907\u6570\u306e\u578b\u3092\u3068\u308a\u3046\u308b\u5834\u5408\u306a\u3069\u306b\u306f\u578b\u3092\u660e\u793a\u3057\u306a\u3044\u3068\u30d3\u30eb\u30c9\u30a8\u30e9\u30fc\u306b\u306a\u308b\u30b1\u30fc\u30b9\u3082\u7d50\u69cb\u3042\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<h3>Rust\u306e\u6574\u6570\u306e\u578b<\/h3>\n<p>Rust\u306b\u306f\u5404bit\u6570\u306e\u6574\u6570\u306e\u578b\u304c\u305d\u308c\u305e\u308c\u5b58\u5728\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u6b63\u3068\u8ca0\u306e\u4e21\u65b9\u306e\u5024\u3092\u53d6\u308c\u308b\u578b\uff08integer, int\uff09\u3068\u6b63\u306e\u5024\u306e\u307f\u53d6\u308c\u308b\u578b\uff08unsigned integer, uint\uff09\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>int\u306e\u5834\u5408\u3067\u3042\u308c\u3070i&lt;\u30d3\u30c3\u30c8\u6570&gt;\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u4f8b\u3048\u307032-bit\u306eint\u3067\u3042\u308c\u3070i32\u3068\u3044\u3063\u305f\u578b\u306e\u6307\u5b9a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>uint\u3067\u3042\u308c\u3070u&lt;\u30d3\u30c3\u30c8\u6570&gt;\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u300232-bit\u3067\u3042\u308c\u3070u32\u3068\u3044\u3063\u305f\u5177\u5408\u3067\u3059\u3002<\/p>\n<p>\u30d3\u30c3\u30c8\u6570\u306fint\u3068uint\u3067\u305d\u308c\u305e\u308c8, 16, 32, 64, 128\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>Python3\u7cfb\u3060\u3068\u30d3\u30eb\u30c8\u30a4\u30f3\u306e\u6574\u6570\u306f\u5024\u306b\u5fdc\u3058\u3066\u30d3\u30c3\u30c8\u6570\u304c\u81ea\u52d5\u3067\u5909\u52d5\u3059\u308b\uff08\u9014\u4e2d\u3067\u5927\u304d\u306a\u5024\u306b\u306a\u3063\u305f\u3089\u5927\u304d\u3044\u30d3\u30c3\u30c8\u6570\u304c\u5272\u308a\u632f\u3089\u308c\u308b\uff09\u305f\u3081\u3001\u5168\u3066int\u306e\u307f\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3042\u307e\u308a\u30d3\u30c3\u30c8\u6570\u306f\u666e\u6bb5\u8003\u3048\u306a\u304f\u3066\u6e08\u3080\u5b9f\u88c5\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002NumPy\u306a\u3069\u3060\u3068int64\u3068\u304buint8\u3068\u304b\u306f\u3042\u308a\u307e\u3059\u306d\u3002<\/p>\n<p>\u30d3\u30c3\u30c8\u6570\u306e\u5927\u304d\u3044\u578b\u306e\u65b9\u304c\u6271\u3048\u308b\u6700\u5927\u306e\u6574\u6570\u306e\u5024\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u30e1\u30e2\u30ea\u7b49\u306e\u8ca0\u8377\u306f\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ed6\u306b\u3082OS\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u4f9d\u5b58\u3059\u308b\u578b\u306e\u6307\u5b9a\u3082\u5b58\u5728\u3057\u307e\u3059\u3002\u4f8b\u3048\u307032bit\u306eOS\u3067\u3042\u308c\u307032bit\u306e\u6574\u6570\u300164bit\u306eOS\u3067\u3042\u308c\u307064bit\u306e\u6574\u6570\u3068\u3044\u3063\u305f\u5177\u5408\u3067\u3059\uff08\u3068\u3044\u3044\u3064\u3064\u300132bit\u306ePC\u304c\u591a\u304b\u3063\u305f\u306e\u304c15\u5e74\u304f\u3089\u3044\u524d\uff1f\u306a\u6c17\u304c\u3057\u306a\u3044\u3067\u3082\u306a\u3044\u306e\u3067\u3082\u3046\u3042\u307e\u308a\u4f7f\u3046\u6a5f\u4f1a\u306f\u306a\u3044\u304b\u3082\u30fb\u30fb\u30fb\u3068\u3044\u3046\u6c17\u306f\u3057\u3066\u3044\u307e\u3059\uff09\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306bOS\u4f9d\u5b58\u306b\u3057\u305f\u3044\u5834\u5408\u306b\u306fint\u306e\u6574\u6570\u3067\u3042\u308c\u3070isize\u3001uint\u306e\u6574\u6570\u3067\u3042\u308c\u3070usize\u3068\u3044\u3046\u578b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">int_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">isize<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6574\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">int_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>2\u9032\u6570\u30fb8\u9032\u6570\u30fb16\u9032\u6570\u306e\u66f8\u304d\u65b9<\/h3>\n<p>0\u30681\u306e\u307f\u306e2\u9032\u6570\uff08Binary number\uff09\u3067\u6570\u5b57\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u6570\u5b57\u306e\u524d\u306b0b\u3068\u4ed8\u3051\u307e\u3059\u3002\u305f\u3068\u3048\u307011110000\uff0810\u9032\u6570\u306e240\uff09\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u306b\u306f0b11110000\u3068\u66f8\u304d\u307e\u3059\u30020b\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9\u306fPython\u3068\u540c\u3058\u3067\u3059\u306d\u3002<\/p>\n<p>\u30b3\u30f3\u30bd\u30fc\u30eb\u51fa\u529b\u306a\u3069\u3092\u3057\u3066\u307f\u308b\u3068\u3001\u5024\u306f10\u9032\u6570\u306e\u6574\u6570\u306b\u306a\u3063\u3066\u6271\u308f\u308c\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">binary_value<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0b11110000<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">binary_value<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f240\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>8\u9032\u6570\uff08Octal number\uff09\u306e\u5834\u5408\u306b\u306f\u6570\u5b57\u306e\u524d\u306b0o\u3068\u4ed8\u3051\u307e\u3059\uff08\u305f\u3060\u3057\u30b2\u30fc\u30e0\u95a2\u4fc2\u3068web\u95a2\u4fc2\u306e\u304a\u4ed5\u4e8b\u3092\u3057\u3066\u304d\u3066\u3001\u4eca\u306e\u3068\u3053\u308d8\u9032\u6570\u306f\u4f7f\u3063\u305f\u3053\u3068\u304c\u306a\u3044\u30fb\u30fb\u30fb\uff09\u3002<\/p>\n<p>0o\u3068\u4ed8\u3051\u308b\u66f8\u304d\u65b9\u3082Python\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">octal_value<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0o764<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">octal_value<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f500\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u306a\u3069\u3067\u304a\u99b4\u67d3\u307f\u306e16\u9032\u6570\uff08Hexadecimal number\uff09\u306f\u6570\u5b57\u306e\u524d\u306b0x\u3068\u4ed8\u3051\u307e\u3059\u3002\u3053\u3061\u3089\u3082Python\u3068\u540c\u3058\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"post-pre\"><code>fn main() {\r\n    let hex_value = 0xff0000;\r\n    println!(\"\u5024\u306f{}\u3067\u3059\u3002\", hex_value);\r\n}\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f16711680\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h3>Rust\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u578b<\/h3>\n<p>\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u5024\u3092\u542b\u3080\u5024\u3001\u3044\u308f\u3086\u308bfloat\u306e\u578b\uff08Floating-Point type\uff09\u306b\u3064\u3044\u3066\u89e6\u308c\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>Rust\u3067\u306f32bit\u306efloat\u306864bit\u306efloat\u306e\u578b\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u305d\u308c\u305e\u308cf32\u3082\u3057\u304f\u306ff64\u3068\u3044\u3046\u578b\u306e\u6307\u5b9a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u578b\u306e\u6307\u5b9a\u3092\u7701\u7565\u3057\u305f\u5834\u5408\u306b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f64bit\uff08f64\uff09\u306e\u578b\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">float_val<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">float_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5df737434c4406cf36b7\/136-0.png\" alt=\"image.png\" \/><\/div>\n<p>32bit\u306e\u578b\u3092\u4f7f\u3044\u305f\u3044\u5834\u5408\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u578b\u3092\u660e\u793a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">float_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">float_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>Rust\u306e\u771f\u507d\u5024\u306e\u578b<\/h3>\n<p>Rust\u306e\u771f\u507d\u5024\u306e\u578b\u306fbool\u3067\u3059\u3002\u578b\u540d\u306fPython\u3068\u4e00\u7dd2\u3067\u3059\u306d\u3002<\/p>\n<p>\u771f\u3068\u507d\u306e\u5024\u306f\u305d\u308c\u305e\u308ctrue\u3068false\u3068\u306a\u308a\u307e\u3059\u3002Python\u3060\u3068\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u3068\u3057\u3066True\u3068False\u3068\u3044\u3063\u305f\u5177\u5408\u306b\u6700\u521d\u304c\u5927\u6587\u5b57\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u304cRust\u3067\u306f\u5c0f\u6587\u5b57\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"c\">\/\/ \u578b\u306e\u6307\u5b9a\u3092\u7701\u7565\u3059\u308b\u5834\u5408\u3002<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">true_val<\/span> <span class=\"o\">=<\/span> <span class=\"k\">true<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"c\">\/\/ \u578b\u3092\u660e\u793a\u3059\u308b\u5834\u5408\u3002<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">false_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">bool<\/span> <span class=\"o\">=<\/span> <span class=\"k\">false<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}, {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">true_val<\/span><span class=\"p\">,<\/span> <span class=\"n\">false_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>true, false\r\n<\/code><\/pre>\n<h3>Rust\u306e\u6587\u5b57\u306e\u578b<\/h3>\n<p>Rust\u3067\u306f\u6587\u5b57\uff08char\uff09\u3068\u6587\u5b57\u5217\uff08&amp;str or String\uff09\u306f\u5225\u7269\u3067\u3059\u3002<br \/>\n\u307e\u305f\u3001Rust\u3067\u306f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3068\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u6319\u52d5\u304c\u7570\u306a\u308a\u307e\u3059\u3002Python\u3060\u3068PEP8\u3068\u304b\u3067\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3069\u3061\u3089\u306e\u30af\u30a9\u30fc\u30c8\u3092\u4f7f\u3046\u306e\u304b\u6c7a\u3081\u3066\u305d\u308c\u306b\u5408\u308f\u305b\u308b\u7684\u306a\u8a18\u8ff0\u304c\u3042\u308a\u307e\u3059\u304c\u3001Rust\u3067\u306f\u7528\u9014\u304c\u660e\u78ba\u306b\u5206\u304b\u308c\u3066\u3044\u308b\u306e\u3067\u4ed6\u306e\u8a00\u8a9e\u306e\u3088\u3046\u306b\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3084\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3069\u3061\u3089\u3092\u4f7f\u3048\u3070\u3044\u3044\u304b\u8ff7\u3063\u305f\u308a\u3057\u306a\u3044\u306e\u306f\u3044\u3044\u3067\u3059\u306d\u3002<\/p>\n<p>\u6587\u5b57\u5358\u4f53\uff08character\uff09\u306e\u5024\u306e\u578b\u306fchar\u3068\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u306f\u306a\u304f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u56f2\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">char<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'a'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6587\u5b57\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>char\u578b\u3092\u6307\u5b9a\u3057\u305f\u72b6\u614b\u3067\u6587\u5b57\u5217\uff08\u8907\u6570\u306e\u6587\u5b57\uff09\u3092\u6307\u5b9a\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">char<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">'apple<\/span><span class=\"err\">'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6587\u5b57\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error: character literal may only contain one codepoint\r\n --&gt; src\\main.rs:2:26\r\n  |\r\n2 |     let char_val: char = 'apple';\r\n  |                          ^^^^^^^\r\n  |\r\nhelp: if you meant to write a `str` literal, use double quotes\r\n  |\r\n2 |     let char_val: char = \"apple\";\r\n  |                          ^^^^^^^\r\n\r\nerror: aborting due to previous error\r\n<\/code><\/pre>\n<p>\u306a\u304a\u30011\u6587\u5b57\u3067\u3042\u308c\u3070\u554f\u984c\u306f\u306a\u3044\u306e\u3067\u65e5\u672c\u8a9e\u3084\u7d75\u6587\u5b57\u306a\u3069\u3067\u3082char\u578b\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">:<\/span> <span class=\"nb\">char<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'?'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6587\u5b57\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">char_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>Rust\u3067\u306e\u6587\u5b57\u5217\u306e\u578b<\/h3>\n<p>Rust\u306e\u6587\u5b57\u5217\u3067\u306f&amp;str\u3068String\u306e2\u3064\u306e\u578b\u304c\u3042\u308b\u305d\u3046\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306b\u3064\u3044\u3066\u306f\u7d50\u69cb\u6df1\u3044\u8a71\u306a\u3088\u3046\u3067\u3001\u9577\u304f\u306a\u308b\u306e\u3067\u3053\u3053\u3067\u306f\u89e6\u308c\u307e\u305b\u3093\u3002\u8a73\u3057\u304f\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>[Rust] &amp;str\u3068String\u3092\u7406\u89e3\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u3089slice\u3084mut\u3092\u7406\u89e3\u3067\u304d\u3066\u306a\u3044\u3053\u3068\u306b\u6c17\u3065\u3044\u305f\u8a71<\/p>\n<p>\u6587\u5b57\u5217\u306b\u306f\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">string_val<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6587\u5b57\u5217\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">string_val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u6587\u5b57\u5217\u306e\u5024\u306fapple\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h3>Rust\u306e\u30bf\u30d7\u30eb\u306e\u578b<\/h3>\n<p>Rust\u306e\u30bf\u30d7\u30eb\u306fPython\u306e\u30bf\u30d7\u30eb\u3068\u307b\u307c\u540c\u3058\u3088\u3046\u306a\u66f8\u304d\u65b9\u3067\u3001()\u306e\u62ec\u5f27\u3092\u4f7f\u3046\u306e\u3068\u5024\u306f\u30b3\u30f3\u30de\u533a\u5207\u308a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u578b\u306e\u6307\u5b9a\u306b\u95a2\u3057\u3066\u306f()\u306e\u62ec\u5f27\u3092\u4f7f\u3063\u3066\u5024\u306e\u4ef6\u6570\u5206\u500b\u5225\u306e\u578b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070int\u3068float\u306e2\u3064\u306e\u5024\u3092\u683c\u7d0d\u3059\u308b\u3088\u3046\u306a\u578b\u306e\u5834\u5408\u306f: (i32, f64)\u3068\u3044\u3063\u305f\u66f8\u304d\u65b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">tpl<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nb\">i32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">f64<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">100<\/span><span class=\"p\">,<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Python\uff083.9\u4ee5\u964d\uff09\u3060\u3068\u578b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u5c11\u3057\u66f8\u304d\u65b9\u304c\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u5024\u306e\u6570\u3060\u3051\u500b\u5225\u306e\u578b\u3092\u5165\u308c\u308b\u5f62\u306f\u8fd1\u3044\u8a18\u8ff0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">tpl<\/span><span class=\"p\">:<\/span> <span class=\"nb\">tuple<\/span><span class=\"p\">[<\/span><span class=\"nb\">int<\/span><span class=\"p\">,<\/span> <span class=\"nb\">float<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">100<\/span><span class=\"p\">,<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u30bf\u30d7\u30eb\u5185\u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f.&lt;\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7&gt;\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u5148\u982d\u306e\u5024\u3067\u3042\u308c\u3070.0\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u62ec\u5f27\u306a\u3069\u306f\u4e0d\u8981\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">tpl<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nb\">i32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">f64<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">100<\/span><span class=\"p\">,<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30bf\u30d7\u30eb\u306e\u6700\u521d\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">tpl<\/span><span class=\"na\">.0<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30bf\u30d7\u30eb\u306e2\u756a\u76ee\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">tpl<\/span><span class=\"na\">.1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u30bf\u30d7\u30eb\u306e\u6700\u521d\u306e\u5024\u306f100\u3067\u3059\u3002\r\n\u30bf\u30d7\u30eb\u306e2\u756a\u76ee\u306e\u5024\u306f3.14\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u6700\u521d\u8aa4\u89e3\u3057\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001Rust\u306e\u30bf\u30d7\u30eb\u306fmut\uff08\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff09\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4ed8\u3051\u308b\u3068\u666e\u901a\u306b\u7de8\u96c6\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3088\u3046\u3067\u3059\u3002Python\u306e\u3088\u3046\u306b\u30bf\u30d7\u30eb\u304c\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306b\u306a\u3063\u305f\u308a\u306f\u3057\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">tpl<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nb\">i32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">f64<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">100<\/span><span class=\"p\">,<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">tpl<\/span><span class=\"na\">.0<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">200<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30bf\u30d7\u30eb\u306e\u6700\u521d\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">tpl<\/span><span class=\"na\">.0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u30bf\u30d7\u30eb\u306e\u6700\u521d\u306e\u5024\u306f200\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h3>Rust\u306e\u914d\u5217\u306e\u578b<\/h3>\n<p>\u914d\u5217\uff08Array\uff09\u306e\u66f8\u304d\u65b9\u3082Python\u306a\u3069\u3068\u5927\u4f53\u4e00\u7dd2\u3067\u3001[]\u306e\u62ec\u5f27\u3092\u4f7f\u3044\u307e\u3059\u3002\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3082[&lt;\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7&gt;]\u3068\u3044\u3063\u305f\u3088\u3046\u306b[]\u306e\u62ec\u5f27\u3092\u4f7f\u3044\u307e\u3059\u3002\u6700\u521d\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u3042\u308c\u3070[0]\u3068\u3044\u3063\u305f\u5177\u5408\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"mi\">20<\/span><span class=\"p\">,<\/span> <span class=\"mi\">30<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u914d\u5217\u306e\u6700\u521d\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">arr<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">]);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u914d\u5217\u306e\u6700\u521d\u306e\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u6ce8\u610f\u3059\u3079\u304d\u70b9\u3068\u3057\u3066\u3001Rust\u306e\u914d\u5217\u306f\u56fa\u5b9a\u9577\u3067\u3059\u3002\u3064\u307e\u308a\u5024\u306e\u8ffd\u52a0\u306a\u3069\u304c\u3067\u304d\u306a\u3044\u3088\u3046\u3067\u3059\u3002<br \/>\n\u5024\u306e\u8ffd\u52a0\u304c\u3067\u304d\u308b\u3082\u306e\u306f\u5225\u9014\u30d9\u30af\u30bf\u30fc\u578b\u3068\u3044\u3046\u3082\u306e\u304c\u5b58\u5728\u3057\u307e\u3059\u3002Python\u306e\u30ea\u30b9\u30c8\u306a\u3069\u306f\u3069\u3061\u3089\u304b\u3068\u3044\u3046\u3068\u3053\u306e\u30d9\u30af\u30bf\u30fc\u578b\u306e\u65b9\u304c\u8fd1\u3044\u30a4\u30e1\u30fc\u30b8\u306b\u306a\u308a\u307e\u3059\u3002\u30d9\u30af\u30bf\u30fc\u578b\u306b\u95a2\u3057\u3066\u306f\u5225\u9014\u6a5f\u4f1a\u304c\u3042\u308c\u3070\u5225\u306e\u8a18\u4e8b\u3067\u66f8\u304d\u307e\u3059\u3002<\/p>\n<p>\u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7bc4\u56f2\u3092\u8d85\u3048\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306b\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u76f4\u63a5\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306b\u306f\u30d3\u30eb\u30c9\u306e\u6642\u70b9\u3067\u30a8\u30e9\u30fc\u3067\u5f3e\u304b\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"mi\">20<\/span><span class=\"p\">,<\/span> <span class=\"mi\">30<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u914d\u5217\u306e\u56db\u756a\u76ee\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">arr<\/span><span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">]);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error: this operation will panic at runtime\r\n --&gt; src\\main.rs:3:32\r\n  |\r\n3 |     println!(\"\u914d\u5217\u306e\u56db\u756a\u76ee\u306e\u5024\u306f{}\u3067\u3059\u3002\", arr[3]);\r\n  |                                            ^^^^^^ index out of bounds: the length is 3 but the index is 3\r\n  |\r\n  = note: `#[deny(unconditional_panic)]` on by default\r\n\r\nerror: aborting due to previous error\r\n<\/code><\/pre>\n<p>\u914d\u5217\u306e\u9577\u3055\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u3001Python\u3067\u306flen\u95a2\u6570\u3092\u631f\u3080\u5f62\u3067\u3059\u304cRust\u3067\u306f\u914d\u5217\u81ea\u4f53\u304c\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066len\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"mi\">20<\/span><span class=\"p\">,<\/span> <span class=\"mi\">30<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u914d\u5217\u306e\u9577\u3055\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">arr<\/span><span class=\"nf\">.len<\/span><span class=\"p\">());<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u914d\u5217\u306e\u9577\u3055\u306f3\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>\u6570\u5024\u306e\u56db\u5247\u6f14\u7b97\u3068\u5270\u4f59<\/h2>\n<p>Rust\u306e\u56db\u5247\u6f14\u7b97\u3068\u5270\u4f59\u3067\u5fc5\u8981\u3068\u306a\u308b\u8a18\u53f7\u306fPython\u3068\u5909\u308f\u3089\u305a\u3001+-*\/%\u3067\u3059\u3002<\/p>\n<p>\u52a0\u7b97\uff08addition\uff09\u4f8b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">addition_result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">addition_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f15\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u6e1b\u7b97\uff08subtraction\uff09\u4f8b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">subtraction_result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">subtraction_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u4e57\u7b97\uff08multiplication\uff09\u4f8b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">multiplication_result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">multiplication_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f60\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u9664\u7b97\uff08division\uff09\u4f8b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">division_result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">15<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">division_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f6\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u9664\u7b97\u3092\u3057\u3066\u3044\u3066\u6c17\u3065\u304d\u307e\u3057\u305f\u304c\u3001\u578b\u63a8\u8ad6\u306a\u3069\u3067\u51e6\u7406\u3059\u308b\u5834\u5408\u3067\u3082\u3069\u3046\u3084\u3089\u5272\u308a\u5207\u308c\u306a\u3044\u5834\u5408\u306f\u5207\u308a\u6368\u3066\u306b\u306a\u3063\u3066\u6574\u6570\u306b\u306a\u3063\u3066\u3044\u308b\u611f\u3058\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8fba\u308a\u306fPython2\u7cfb\u306b\u8fd1\u3044\u6319\u52d5\u3067\u3057\u3087\u3046\u304b\u3002\u305d\u306e\u307e\u307e\u3060\u3068Python3\u7cfb\u306e\u3088\u3046\u306b\u9664\u7b97\u7d50\u679c\u304cfloat\u306b\u306a\u3063\u305f\u308a\u306f\u3057\u306a\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n<p>\u8a66\u3057\u306b\u8a08\u7b97\u81ea\u4f53\u306b.0\u3092\u4ed8\u3051\u3066float\u306e\u5024\u540c\u58eb\u3067\u8a08\u7b97\u3057\u3066\u307f\u308b\u3068\u3001\u7d50\u679c\u3082float\u306e\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">division_result<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">100.0<\/span> <span class=\"o\">\/<\/span> <span class=\"mf\">15.0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">division_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f6.666666666666667\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u5909\u6570\u306e\u578b\u81ea\u4f53\u3092f64\u306a\u3069\u306b\u3057\u3066\u304a\u3051\u3070\u6574\u6570\u540c\u58eb\u306e\u9664\u7b97\u7d50\u679c\u3082float\u306b\u306a\u308b\u306e\u3067\u306f\uff1f\u3068\u8a66\u3057\u3066\u307f\u307e\u3059\u304c\u305d\u3061\u3089\u306f\u30d3\u30eb\u30c9\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u7d50\u679c\u306e\u5024\u3092f64\u306b\u3057\u305f\u3051\u308c\u3070\u9664\u7b97\u306e\u6570\u5024\u5074\u3082\u305d\u308c\u305e\u308cfloat\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">division_result<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">15<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">division_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error[E0308]: mismatched types\r\n --&gt; src\\main.rs:2:32\r\n  |\r\n2 |     let division_result: f64 = 100 \/ 15;\r\n  |                          ---   ^^^^^^^^ expected `f64`, found integer\r\n  |                          |\r\n  |                          expected due to this\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0308`.\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3042\u305f\u308a\u306fPython\u3068\u6bd4\u3079\u308b\u3068\u5927\u5206\u578b\u306e\u53b3\u5bc6\u6027\u304c\u9ad8\u3044\u3067\u3059\u306d\u30fb\u30fb\u30fb\u3002\u305f\u3060\u3001\u4ed5\u4e8b\u3067Python\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3067Rust\u30fb\u30fb\u30fb\u3068\u3057\u3066\u3044\u308b\u3068\u3001\u7a00\u306bfloat\u306b\u306a\u308b\u611f\u899a\u3067\u9664\u7b97\u306e\u51e6\u7406\u3092\u66f8\u3044\u3066\u30df\u30b9\u3057\u305d\u3046\u306a\u6c17\u306f\u3057\u307e\u3059\u3002\u6c17\u3092\u4ed8\u3051\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u5270\u4f59\u3067\u3059\u3002<\/p>\n<p>\u5270\u4f59\uff08remainder\uff09\u4f8b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">remainder_result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">15<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">remainder_result<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>Rust\u3067\u306e\u95a2\u6570\u306e\u66f8\u304d\u65b9<\/h2>\n<p>\u65e2\u306b\u3053\u308c\u307e\u3067\u3067\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3068\u306a\u308bmain\u95a2\u6570\u306f\u4f7f\u3063\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u7bc0\u304b\u3089\u306f\u95a2\u6570\u306b\u95a2\u3057\u3066\u8a73\u3057\u304f\u89e6\u308c\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u95a2\u6570\u5ba3\u8a00\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u306ffn\u3067\u3059\u3002Python\u306edef\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n<p>\u5f15\u6570\u8a2d\u5b9a\u90e8\u5206\u306f()\u306e\u62ec\u5f27\u3092\u4f7f\u3044\u3001\u8907\u6570\u306e\u5f15\u6570\u306e\u5834\u5408\u306b\u306f\u30b3\u30f3\u30de\u533a\u5207\u308a\u3067\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u70b9\u306fPython\u3068\u4e00\u7dd2\u3067\u3059\u306d\u3002<\/p>\n<p>\u95a2\u6570\u5185\u5bb9\u306e\u958b\u59cb\u3068\u7d42\u4e86\u306f{}\u306e\u62ec\u5f27\u3092\u4f7f\u3044\u307e\u3059\u3002Python\u3060\u3068\u3053\u306e\u62ec\u5f27\u306f\u7121\u304f\u30a4\u30f3\u30c7\u30f3\u30c8\u3067\u8868\u73fe\u3068\u306a\u308b\u306e\u3067\u3001\u3053\u306e\u8fba\u306fjs\u3068\u304b\u306b\u8fd1\u3044\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<h3>\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057<\/h3>\n<p>\u4ed6\u306e\u95a2\u6570\u304b\u3089\u7279\u5b9a\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u95a2\u6570\u540d()\u3068\u3044\u3063\u305f\u3088\u3046\u306b()\u306e\u62ec\u5f27\u3092\u95a2\u6570\u540d\u306e\u76f4\u5f8c\u306b\u4ed8\u3051\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">print_hello<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">print_hello<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello Rust!\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>Hello Rust!\r\n<\/code><\/pre>\n<h3>\u5f15\u6570\u8a2d\u5b9a<\/h3>\n<p>\u5f15\u6570\u306f()\u62ec\u5f27\u306e\u4e2d\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u5f15\u6570\u306e\u5834\u5408\u306b\u306f\u30b3\u30f3\u30de\u3067\u533a\u5207\u308a\u307e\u3059\u3002\u578b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3082\u5fc5\u9808\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">print_info<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30bf\u30de\"<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">print_info<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u540d\u524d\u306f{}\u3001\u6b73\u306f{}\u6b73\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u540d\u524d\u306f\u30bf\u30de\u3001\u6b73\u306f5\u6b73\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h3>\u8fd4\u5374\u5024\u8a2d\u5b9a<\/h3>\n<p>\u8fd4\u5374\u5024\u3092\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u95a2\u6570\u306e\u5f15\u6570\u8a2d\u5b9a\u3068{\u306e\u62ec\u5f27\u306e\u524d\u306b-&gt; &lt;\u578b\u540d&gt; {\u3068\u3044\u3063\u305f\u3088\u3046\u306a\u578b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u66f8\u304d\u65b9\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6b73\u306f{}\u6b73\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Python\u3060\u3068\u578b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u4ed8\u304d\u3060\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u306e\u3067\u3001\u578b\u306e\u8a18\u8ff0\u95a2\u4fc2\u306f\u3042\u308b\u7a0b\u5ea6\u4f3c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">def<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">()<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"nb\">int<\/span><span class=\"p\">:<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">5<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u304a\u3001Rust\u3067\u306f\u95a2\u6570\u306e\u672b\u7aef\u306e\u90e8\u5206\u306e\u5834\u5408return\u30ad\u30fc\u30ef\u30fc\u30c9\u7121\u3057\u306b\u8fd4\u5374\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6b73\u306f{}\u6b73\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"mi\">5<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u6b73\u306f5\u6b73\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u3053\u306e\u5834\u5408\u5024\u306e\u5f8c\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u306f\u4ed8\u3051\u3066\u3044\u306a\u3044\u70b9\u306b\u306f\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u4ed8\u3051\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6b73\u306f{}\u6b73\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">get_age<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>error[E0308]: mismatched types\r\n --&gt; src\\main.rs:6:17\r\n  |\r\n6 | fn get_age() -&gt; i32 {\r\n  |    -------      ^^^ expected `i32`, found `()`\r\n  |    |\r\n  |    implicitly returns `()` as its body has no tail or `return` expression\r\n7 |     5;\r\n  |      - help: consider removing this semicolon\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0308`.\r\n<\/code><\/pre>\n<p>\u3053\u306e\u8fba\u308a\u306fRust\u306e\u5f0f\uff08expression\uff09\u3068\u6587\uff08statement\uff09\u306b\u3088\u308b\u6319\u52d5\u306b\u3088\u308b\u5f71\u97ff\u3068\u306a\u308a\u3001\u30bb\u30df\u30b3\u30ed\u30f3\u304c\u4ed8\u3044\u305f\u5834\u5408\u306b\u306fstatement\u3068\u306a\u308a\u5024\u3092\u8fd4\u3055\u306a\u3044\u5f62\u3068\u306a\u308a\u3001\u30bb\u30df\u30b3\u30ed\u30f3\u304c\u7121\u3044\u5834\u5408\u306b\u306f\u5024\u304c\u8fd4\u5374\u3055\u308c\u308b\uff08\u5909\u6570\u306a\u3069\u306b\u4ee3\u5165\u304c\u3067\u304d\u308b\uff09\u3068\u3044\u3046\u4ed5\u69d8\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>expression\u3068statement\u306b\u95a2\u3057\u3066\u306f\u305d\u308c\u3060\u3051\u3067\u8a18\u4e8b\u304c\u304b\u306a\u308a\u9577\u304f\u306a\u308a\u305d\u3046\u306a\u306e\u3067\u4eca\u56de\u306f\u5272\u611b\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u3068\u3066\u3082\u53c2\u8003\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>Rust \u306e\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u5fb9\u5e95\u7406\u89e3\u3059\u308b<\/p>\n<p>\u95a2\u6570\u306e\u9014\u4e2d\u3067if\u6587\u306a\u3069\u3067\u8fd4\u5374\u5024\u3092\u8a2d\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u306freturn\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h2>Rust\u306e\u30b3\u30e1\u30f3\u30c8<\/h2>\n<p>\u30a4\u30f3\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\u306fjs\u306e\u3088\u3046\u306b\/\/\u3067\u66f8\u304d\u307e\u3059\u3002\/**\/\u306a\u3069\u306b\u3088\u308b\u8907\u6570\u884c\u3092\u5bfe\u8c61\u3068\u3057\u305f\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u306f\u7121\u304f\u3001\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u5404\u884c\u306b\/\/\u306e\u8a18\u8ff0\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\uff08\u307e\u3042Python\u3067\u3082\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u7121\u304f\u3066\u3082\u7279\u306b\u56f0\u3063\u3066\u3044\u306a\u3044\u306e\u3067\u554f\u984c\u306f\u7121\u3044\u3067\u3057\u3087\u3046\u2026\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u30b3\u30fc\u30c9\u306e\u4e0a\u306b\u30b3\u30e1\u30f3\u30c8\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u884c\u672b\u306b\u30b3\u30e1\u30f3\u30c8\u3092\u7f6e\u304f\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>Rust\u306e\u6761\u4ef6\u5206\u5c90<\/h2>\n<p>\u6761\u4ef6\u5206\u5c90\u306b\u306fif\u3001else if\u3001else\u3068\u3044\u3063\u305f\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002Python\u306eelif\u304celse if\u3068\u306a\u308b\u4ee5\u5916\u306f\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u6319\u52d5\u306f\u4e00\u7dd2\u3067\u3059\u3002<\/p>\n<p>\u6761\u4ef6\u6587\u306e\u3068\u3053\u308d\u306b()\u306e\u62ec\u5f27\u304c\u4e0d\u8981\u306a\u306e\u306fPython\u3068\u4e00\u7dd2\u3067\u3059\u304c\u3001\u6761\u4ef6\u306b\u8a72\u5f53\u3059\u308b\u51e6\u7406\u306e\u30d6\u30ed\u30c3\u30af\u306b\u306f{}\u306e\u62ec\u5f27\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">num<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">7<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6570\u5024\u306f7\u3088\u308a\u3082\u5927\u304d\u306a\u5024\u3067\u3059\u3002\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"k\">if<\/span> <span class=\"n\">num<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">5<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6570\u5024\u306f5\u3088\u308a\u3082\u5927\u304d\u306a\u5024\u3067\u3059\u3002\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6570\u5024\u306f5\u4ee5\u4e0b\u306e\u5024\u3067\u3059\u3002\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u304a\u3001Rust\u306eif\u6587\u306e\u6761\u4ef6\u306b\u306f\u771f\u507d\u5024\u3057\u304b\u8a31\u5bb9\u3055\u308c\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u4ed6\u306e\u8a00\u8a9e\u3067\u3088\u304f\u3042\u308b\u3088\u3046\u306a\u6570\u5024\u306a\u3069\u3092\u6761\u4ef6\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\uff080\u3060\u3063\u305f\u3089false, nan\u3084None\u3067\u3042\u308c\u3070false, \u7a7a\u6587\u5b57\u3060\u3063\u305f\u3089false&#8230;\u3068\u3044\u3063\u305f\u5236\u5fa1\u306f\u3067\u304d\u307e\u305b\u3093\uff09\u3002\u305d\u306e\u305f\u3081js\u3084PHP\u306a\u3069\u3067\u3042\u308b\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306a\u3069\u3082\u5b58\u5728\u3057\u307e\u305b\u3093\uff08\u500b\u4eba\u7684\u306b\u306f\u7b49\u4fa1\u6f14\u7b97\u5b50\u304c1\u3064\u3060\u3051\u3067\u3001\u4e14\u3064\u53b3\u5bc6\u3067\u30df\u30b9\u304c\u6e1b\u308a\u305d\u3046\u306a\u306e\u3067\u597d\u307f\u306a\u4ed5\u69d8\u3067\u3059\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6570\u5024\u306a\u3069\u3092\u6761\u4ef6\u306b\u6307\u5b9a\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">num<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u3059\u3002\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code> --&gt; src\\main.rs:3:8\r\n  |\r\n3 |     if num {\r\n  |        ^^^ expected `bool`, found integer\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0308`.\r\n<\/code><\/pre>\n<h2>Rust\u306e\u30eb\u30fc\u30d7\u5236\u5fa1<\/h2>\n<p>Rust\u306e\u30eb\u30fc\u30d7\u306floop, while, for\u306e\u4e09\u3064\u304c\u3042\u308a\u307e\u3059\u3002while\u306fPython\u3068\u307b\u307c\u4e00\u7dd2\u3001for\u3082Python\u306b\u8fd1\u3044\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002loop\u306fPython\u306b\u306f\u7121\u3044\u3082\u306e\u3067\u3059\u304c\u3001break\u3055\u305b\u308b\u307e\u3067\u305a\u3063\u3068\u30eb\u30fc\u30d7\u3057\u7d9a\u3051\u308b\u30fb\u30fb\u30fb\u3068\u3044\u3063\u305f\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\uff08\u6761\u4ef6\u6587\u3092\u5207\u308a\u96e2\u3057\u3066\u66f8\u304f\u5fc5\u8981\u306e\u3042\u308bwhile\u6587\u30fb\u30fb\u30fb\u3068\u3044\u3063\u305f\u6319\u52d5\u3092\u3057\u307e\u3059\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">loop<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">num<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">10<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30eb\u30fc\u30d7\u5f8c\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u30eb\u30fc\u30d7\u5f8c\u306e\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>loop\u3068while\u306f\u591a\u5c11\u66f8\u304d\u65b9\u304c\u5909\u308f\u308b\u3082\u306e\u306e\u304a\u4e92\u3044\u306b\u4f3c\u305f\u3088\u3046\u306a\u5236\u5fa1\u3068\u6319\u52d5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">while<\/span> <span class=\"n\">num<\/span> <span class=\"o\">!=<\/span> <span class=\"mi\">10<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30eb\u30fc\u30d7\u5f8c\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u30eb\u30fc\u30d7\u5f8c\u306e\u5024\u306f10\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>for\u306b\u95a2\u3057\u3066\u306f\u914d\u5217\u306a\u3069\u306eiter\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001Python\u306efor\u3068\u540c\u3058\u3088\u3046\u306a\u6319\u52d5\u3092\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">num_arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"mi\">20<\/span><span class=\"p\">,<\/span> <span class=\"mi\">30<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">num<\/span> <span class=\"n\">in<\/span> <span class=\"n\">num_arr<\/span><span class=\"nf\">.iter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u914d\u5217\u306e\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u914d\u5217\u306e\u5024\u306f10\u3067\u3059\u3002\r\n\u914d\u5217\u306e\u5024\u306f20\u3067\u3059\u3002\r\n\u914d\u5217\u306e\u5024\u306f30\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>Python\u306erange(10)\u7684\u306a\u3001\u7279\u5b9a\u306e\u6574\u6570\u7bc4\u56f2\u3067\u30eb\u30fc\u30d7\u3092\u56de\u3057\u305f\u3044\u5834\u5408\u306b\u306f&lt;\u958b\u59cb\u30a4\u30f3\u30c7\u30c3\u30af\u30b9&gt;..&lt;\u7d42\u4e86\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 + 1&gt;\u307f\u305f\u3044\u306a\u66f8\u304d\u65b9\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u30700\uff5e9\u306e\u7bc4\u56f2\u3067\u30eb\u30fc\u30d7\u3092\u56de\u3057\u305f\u3044\u5834\u5408\u306b\u306f0..10\u3068\u3044\u3063\u305f\u66f8\u304d\u65b9\u306b\u306a\u308a\u307e\u3059\u3002Python\u540c\u69d8\u7d42\u4e86\u5074\u306f\u542b\u307e\u306a\u3044\u305f\u30811\u5927\u304d\u3044\u5024\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">num<\/span> <span class=\"n\">in<\/span> <span class=\"mi\">0<\/span><span class=\"o\">..<\/span><span class=\"mi\">10<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u5024\u306f{}\u3067\u3059\u3002\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>\u5024\u306f0\u3067\u3059\u3002\r\n\u5024\u306f1\u3067\u3059\u3002\r\n...\r\n\u5024\u306f8\u3067\u3059\u3002\r\n\u5024\u306f9\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h1>\u53c2\u8003\u30b5\u30a4\u30c8\u30fb\u53c2\u8003\u6587\u732e\u307e\u3068\u3081<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">The Rust Programming Language (Covers Rust 2018)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Install Rust<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">rust String &amp;str \u306e\u5909\u63db\u3068\u3001\u6587\u5b57\u5217 \u6570\u5024 \u306e\u5909\u63db<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Rust \u306e\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u5fb9\u5e95\u7406\u89e3\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Rust\u306b\u3063\u304d\/3\u65e5\u76ee\u30fb\u57fa\u672c\u306e\u578b\uff12<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">[Rust] &amp;str\u3068String\u3092\u7406\u89e3\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u3089slice\u3084mut\u3092\u7406\u89e3\u3067\u304d\u3066\u306a\u3044\u3053\u3068\u306b\u6c17\u3065\u3044\u305f\u8a71<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1Rust\u306b\u5165\u9580\u3057\u59cb\u3081\u305f\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u66f8\u304d\u65b9\u306e\u57fa\u672c\u7684\u306a\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u306b\u3064\u3044\u3066\u5fa9\u7fd2\u3092\u517c\u306d\u3066\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3057\u3066 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45284","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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