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<div class="section-level-extent" id="Case-Ranges"> <div class="nav-panel"> <p> Next: <a href="cast-to-union" accesskey="n" rel="next">Cast to a Union Type</a>, Previous: <a href="designated-inits" accesskey="p" rel="prev">Designated Initializers</a>, Up: <a href="c-extensions" accesskey="u" rel="up">Extensions to the C Language Family</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div> <h1 class="section" id="Case-Ranges-1"><span>6.30 Case Ranges<a class="copiable-link" href="#Case-Ranges-1"> ¶</a></span></h1> <p>You can specify a range of consecutive values in a single <code class="code">case</code> label, like this: </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">case <var class="var">low</var> ... <var class="var">high</var>:</pre>
</div> <p>This has the same effect as the proper number of individual <code class="code">case</code> labels, one for each integer value from <var class="var">low</var> to <var class="var">high</var>, inclusive. </p> <p>This feature is especially useful for ranges of ASCII character codes: </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">case 'A' ... 'Z':</pre>
</div> <p><strong class="strong">Be careful:</strong> Write spaces around the <code class="code">...</code>, for otherwise it may be parsed wrong when you use it with integer values. For example, write this: </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">case 1 ... 5:</pre>
</div> <p>rather than this: </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">case 1...5:</pre>
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