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| 22 | <title>continue Statement (GNU C Language Manual)</title>
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| 57 | <body lang="en">
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| 58 | <span id="continue-Statement"></span><div class="header">
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| 59 | <p>
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| 60 | Previous: <a href="for_002dIndex-Declarations.html" accesskey="p" rel="prev">for-Index Declarations</a>, Up: <a href="Loop-Statements.html" accesskey="u" rel="up">Loop Statements</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Index.html" title="Index" rel="index">Index</a>]</p>
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| 61 | </div>
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| 62 | <hr>
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| 63 | <span id="continue-Statement-1"></span><h4 class="subsection">19.6.8 <code>continue</code> Statement</h4>
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| 64 | <span id="index-continue-statement"></span>
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| 65 | <span id="index-statement_002c-continue"></span>
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| 66 | <span id="index-continue"></span>
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| 67 |
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| 68 | <p>The <code>continue</code> statement looks like ‘<samp>continue;</samp>’, and its
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| 69 | effect is to jump immediately to the end of the innermost loop
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| 70 | construct. If it is a <code>for</code>-loop, the next thing that happens
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| 71 | is to execute the loop’s <var>advance</var> expression.
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| 72 | </p>
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| 73 | <p>For example, this loop increments <code>p</code> until the next null character
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| 74 | or newline, and operates (in some way not shown) on all the characters
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| 75 | in the line except for spaces. All it does with spaces is skip them.
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| 76 | </p>
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| 77 | <div class="example">
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| 78 | <pre class="example">for (;*p; ++p)
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| 79 | {
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| 80 | /* <span class="roman">End loop if we have reached a newline.</span> */
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| 81 | if (*p == '\n')
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| 82 | break;
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| 83 | /* <span class="roman">Pay no attention to spaces.</span> */
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| 84 | if (*p == ' ')
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| 85 | continue;
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| 86 | /* <span class="roman">Operate on the next character.</span> */
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| 87 | <span class="roman">…</span>
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| 88 | }
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| 89 | </pre></div>
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| 90 |
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| 91 | <p>Executing ‘<samp>continue;</samp>’ skips the loop body but it does not
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| 92 | skip the <var>advance</var> expression, <code>p++</code>.
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| 93 | </p>
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| 94 | <p>We could also write it like this:
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| 95 | </p>
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| 96 | <div class="example">
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| 97 | <pre class="example">for (;*p; ++p)
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| 98 | {
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| 99 | /* <span class="roman">Exit if we have reached a newline.</span> */
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| 100 | if (*p == '\n')
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| 101 | break;
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| 102 | /* <span class="roman">Pay no attention to spaces.</span> */
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| 103 | if (*p != ' ')
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| 104 | {
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| 105 | /* <span class="roman">Operate on the next character.</span> */
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| 106 | <span class="roman">…</span>
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| 107 | }
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| 108 | }
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| 109 | </pre></div>
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| 110 |
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| 111 | <p>The advantage of using <code>continue</code> is that it reduces the
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| 112 | depth of nesting.
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| 113 | </p>
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| 114 | <p>Contrast <code>continue</code> with the <code>break</code> statement. See <a href="break-Statement.html">break Statement</a>.
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| 115 | </p>
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| 116 |
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| 117 |
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| 118 |
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