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| 22 | <title>Statements (GNU C Language Manual)</title>
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| 33 | <link href="Expression-Statement.html" rel="next" title="Expression Statement">
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| 57 | <body lang="en">
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| 58 | <span id="Statements"></span><div class="header">
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| 59 | <p>
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| 60 | Next: <a href="Variables.html" accesskey="n" rel="next">Variables</a>, Previous: <a href="Defining-Typedef-Names.html" accesskey="p" rel="prev">Defining Typedef Names</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</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="Statements-1"></span><h2 class="chapter">19 Statements</h2>
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| 64 | <span id="index-statements"></span>
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| 65 |
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| 66 | <p>A <em>statement</em> specifies computations to be done for effect; it
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| 67 | does not produce a value, as an expression would. In general a
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| 68 | statement ends with a semicolon (‘<samp>;</samp>’), but blocks (which are
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| 69 | statements, more or less) are an exception to that rule.
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| 70 | See <a href="Blocks.html">Blocks</a>.
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| 71 | </p>
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| 72 | <p>The places to use statements are inside a block, and inside a
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| 73 | complex statement. A <em>complex statement</em> contains one or two
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| 74 | components that are nested statements. Each such component must
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| 75 | consist of one and only one statement. The way to put multiple
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| 76 | statements in such a component is to group them into a <em>block</em>
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| 77 | (see <a href="Blocks.html">Blocks</a>), which counts as one statement.
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| 78 | </p>
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| 79 | <p>The following sections describe the various kinds of statement.
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| 80 | </p>
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| 81 | <table class="menu" border="0" cellspacing="0">
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| 82 | <tr><td align="left" valign="top">• <a href="Expression-Statement.html" accesskey="1">Expression Statement</a></td><td> </td><td align="left" valign="top">Evaluate an expression, as a statement,
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| 83 | usually done for a side effect.
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| 84 | </td></tr>
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| 85 | <tr><td align="left" valign="top">• <a href="if-Statement.html" accesskey="2">if Statement</a></td><td> </td><td align="left" valign="top">Basic conditional execution.
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| 86 | </td></tr>
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| 87 | <tr><td align="left" valign="top">• <a href="if_002delse-Statement.html" accesskey="3">if-else Statement</a></td><td> </td><td align="left" valign="top">Multiple branches for conditional execution.
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| 88 | </td></tr>
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| 89 | <tr><td align="left" valign="top">• <a href="Blocks.html" accesskey="4">Blocks</a></td><td> </td><td align="left" valign="top">Grouping multiple statements together.
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| 90 | </td></tr>
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| 91 | <tr><td align="left" valign="top">• <a href="return-Statement.html" accesskey="5">return Statement</a></td><td> </td><td align="left" valign="top">Return a value from a function.
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| 92 | </td></tr>
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| 93 | <tr><td align="left" valign="top">• <a href="Loop-Statements.html" accesskey="6">Loop Statements</a></td><td> </td><td align="left" valign="top">Repeatedly executing a statement or block.
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| 94 | </td></tr>
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| 95 | <tr><td align="left" valign="top">• <a href="switch-Statement.html" accesskey="7">switch Statement</a></td><td> </td><td align="left" valign="top">Multi-way conditional choices.
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| 96 | </td></tr>
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| 97 | <tr><td align="left" valign="top">• <a href="switch-Example.html" accesskey="8">switch Example</a></td><td> </td><td align="left" valign="top">A plausible example of using <code>switch</code>.
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| 98 | </td></tr>
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| 99 | <tr><td align="left" valign="top">• <a href="Duffs-Device.html" accesskey="9">Duffs Device</a></td><td> </td><td align="left" valign="top">A special way to use <code>switch</code>.
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| 100 | </td></tr>
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| 101 | <tr><td align="left" valign="top">• <a href="Case-Ranges.html">Case Ranges</a></td><td> </td><td align="left" valign="top">Ranges of values for <code>switch</code> cases.
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| 102 | </td></tr>
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| 103 | <tr><td align="left" valign="top">• <a href="Null-Statement.html">Null Statement</a></td><td> </td><td align="left" valign="top">A statement that does nothing.
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| 104 | </td></tr>
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| 105 | <tr><td align="left" valign="top">• <a href="goto-Statement.html">goto Statement</a></td><td> </td><td align="left" valign="top">Jump to another point in the source code,
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| 106 | identified by a label.
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| 107 | </td></tr>
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| 108 | <tr><td align="left" valign="top">• <a href="Local-Labels.html">Local Labels</a></td><td> </td><td align="left" valign="top">Labels with limited scope.
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| 109 | </td></tr>
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| 110 | <tr><td align="left" valign="top">• <a href="Labels-as-Values.html">Labels as Values</a></td><td> </td><td align="left" valign="top">Getting the address of a label.
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| 111 | </td></tr>
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| 112 | <tr><td align="left" valign="top">• <a href="Statement-Exprs.html">Statement Exprs</a></td><td> </td><td align="left" valign="top">A series of statements used as an expression.
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| 113 | </td></tr>
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| 114 | </table>
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| 115 |
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| 116 | <hr>
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| 117 | <div class="header">
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| 118 | <p>
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| 119 | Next: <a href="Variables.html" accesskey="n" rel="next">Variables</a>, Previous: <a href="Defining-Typedef-Names.html" accesskey="p" rel="prev">Defining Typedef Names</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</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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