{"id":3941,"date":"2024-03-13T07:42:32","date_gmt":"2024-03-13T07:42:32","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-get-the-length-of-a-string-in-c\/"},"modified":"2025-07-30T23:11:41","modified_gmt":"2025-07-30T23:11:41","slug":"how-to-get-the-length-of-a-string-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-get-the-length-of-a-string-in-c\/","title":{"rendered":"C++ String Length: length() vs size() Methods"},"content":{"rendered":"<p>In C++, you can use the length() method of the std::string class to find the length of a string, or you can use the size() method. For example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    std::string str = <span class=\"hljs-string\">\"Hello, World!\"<\/span>;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u4f7f\u7528length()\u65b9\u6cd5\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6<\/span>\r\n    <span class=\"hljs-type\">int<\/span> len1 = str.<span class=\"hljs-built_in\">length<\/span>();\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u4f7f\u7528size()\u65b9\u6cd5\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6<\/span>\r\n    <span class=\"hljs-type\">int<\/span> len2 = str.<span class=\"hljs-built_in\">size<\/span>();\r\n    \r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"Length of string using length() method: \"<\/span> &lt;&lt; len1 &lt;&lt; std::endl;\r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"Length of string using size() method: \"<\/span> &lt;&lt; len2 &lt;&lt; std::endl;\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 above code will produce:<\/p>\n<pre class=\"post-pre\"><code>Length of string using length() method: 13\r\nLength of string using size() method: 13\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>In C++, you can use the length() method of the std::string class to find the length of a string, or you can use the size() method. For example: #include &lt;iostream&gt; #include &lt;string&gt; int main() { std::string str = &#8220;Hello, World!&#8221;; \/\/ \u4f7f\u7528length()\u65b9\u6cd5\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6 int len1 = str.length(); \/\/ \u4f7f\u7528size()\u65b9\u6cd5\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6 int len2 = str.size(); std::cout &lt;&lt; &#8220;Length [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[381,2948,2949,2950,2947],"class_list":["post-3941","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-programming","tag-c-strings","tag-length-method","tag-size-method","tag-string-length"],"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>C++ String Length: length() vs size() Methods - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to get string length in C++ using length() and size() methods. 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