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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>for</title> <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="../index.html">cppreference.com</a> > <a href= "index.html">C/C++ Keywords</a> > <a href="for.html">for</a> </div> <div class="name-format"> for </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> for( initialization; test-condition; increment ) { statement-list; }</pre> <p>The for construct is a general looping mechanism consisting of 4 parts:</p> <ol> <li>the initialization, which consists of 0 or more comma-delimited variable initialization statements</li> <li>the test-condition, which is evaluated to determine if the execution of the for loop will continue</li> <li>the increment, which consists of 0 or more comma-delimited statements that increment variables</li> <li>and the statement-list, which consists of 0 or more statements that will be executed each time the loop is executed.</li> </ol> <p>For example:</p> <pre class="example-code"> for( int i = 0; i < 10; i++ ) { cout << "i is " << i << endl; } int j, k; for( j = 0, k = 10; j < k; j++, k-- ) { cout << "j is " << j << " and k is " << k << endl; } for( ; ; ) { // loop forever! } </pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="break.html">break</a><br> <a href="continue.html">continue</a><br> <a href="do.html">do</a><br> <a href="if.html">if</a><br> <a href="while.html">while</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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