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<a name="strupr_002d_002d_002dforce-string-to-uppercase"></a>
<h3 class="section">5.43 <code>strupr</code>&mdash;force string to uppercase</h3>
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<p><strong>Synopsis</strong>
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<pre class="example">#include &lt;string.h&gt;
char *strupr(char *<var>a</var>);

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<p><strong>Description</strong><br>
<code>strupr</code> converts each character in the string at <var>a</var> to
uppercase.
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<p><strong>Returns</strong><br>
<code>strupr</code> returns its argument, <var>a</var>.
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<p><strong>Portability</strong><br>
<code>strupr</code> is not widely portable.
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<p><code>strupr</code> requires no supporting OS subroutines.
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