{"id":20217,"date":"2024-03-15T20:06:55","date_gmt":"2024-03-15T20:06:55","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-bool-data-type-in-c-language\/"},"modified":"2024-03-21T17:33:33","modified_gmt":"2024-03-21T17:33:33","slug":"how-to-use-the-bool-data-type-in-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-bool-data-type-in-c-language\/","title":{"rendered":"How to use the bool data type in C language?"},"content":{"rendered":"<p>In C language, there is no built-in bool type, but the int type can be used to simulate bool type. Typically, 0 is considered false, while any non-zero value is considered true.<\/p>\n<p>For example, you can create a function to determine if a number is even.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">isEven<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> num)<\/span> {\r\n    <span class=\"hljs-keyword\">if<\/span> (num % <span class=\"hljs-number\">2<\/span> == <span class=\"hljs-number\">0<\/span>) {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;  <span class=\"hljs-comment\">\/\/ \u8fd4\u56de\u975e\u96f6\u503c\u8868\u793a\u771f\uff08true\uff09<\/span>\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;  <span class=\"hljs-comment\">\/\/ \u8fd4\u56de\u96f6\u503c\u8868\u793a\u5047\uff08false\uff09<\/span>\r\n    }\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">int<\/span> num = <span class=\"hljs-number\">4<\/span>;\r\n    <span class=\"hljs-keyword\">if<\/span> (isEven(num)) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%d is even\\n\"<\/span>, num);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%d is odd\\n\"<\/span>, num);\r\n    }\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>The output is:<\/p>\n<pre class=\"post-pre\"><code>4 is even\r\n<\/code><\/pre>\n<p>The introduction of the _Bool type and the stdbool.h header file in the C99 standard (or <bool.h> in C++) is to support the bool type. It can be used as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdbool.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">_Bool<\/span> b1 = <span class=\"hljs-literal\">true<\/span>;  <span class=\"hljs-comment\">\/\/ \u6216\u8005\u4f7f\u7528bool\u7c7b\u578b<\/span>\r\n    <span class=\"hljs-type\">_Bool<\/span> b2 = <span class=\"hljs-literal\">false<\/span>;  <span class=\"hljs-comment\">\/\/ \u6216\u8005\u4f7f\u7528bool\u7c7b\u578b<\/span>\r\n\r\n    <span class=\"hljs-keyword\">if<\/span> (b1) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"b1 is true\\n\"<\/span>);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"b1 is false\\n\"<\/span>);\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">if<\/span> (b2) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"b2 is true\\n\"<\/span>);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"b2 is false\\n\"<\/span>);\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>The output results are:<\/p>\n<pre class=\"post-pre\"><code>b1 is true\r\nb2 is false\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>In C language, there is no built-in bool type, but the int type can be used to simulate bool type. Typically, 0 is considered false, while any non-zero value is considered true. For example, you can create a function to determine if a number is even. #include &lt;stdio.h&gt; int isEven(int num) { if (num % [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-20217","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) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to use the bool data type in C language? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-bool-data-type-in-c-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to use the bool data type in C language?\" \/>\n<meta property=\"og:description\" content=\"In C language, there is no built-in bool type, but the int type can be used to simulate bool type. Typically, 0 is considered false, while any non-zero value is considered true. 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