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<a name="towupper_002c-towupper_005fl_002d_002d_002dtranslate-wide-characters-to-uppercase"></a>
<h3 class="section">3.31 <code>towupper</code>, <code>towupper_l</code>&mdash;translate wide characters to uppercase</h3>
<a name="index-towupper"></a>
<a name="index-towupper_005fl"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;wctype.h&gt;
wint_t towupper(wint_t <var>c</var>);

#include &lt;wctype.h&gt;
wint_t towupper_l(wint_t <var>c</var>, locale_t <var>locale</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>towupper</code> is a function which converts lowercase wide characters to
uppercase, leaving all other characters unchanged.
</p>
<p><code>towupper_l</code> is like <code>towupper</code> but performs the function based on the
locale specified by the locale object locale.  If <var>locale</var> is
LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
</p>
<br>
<p><strong>Returns</strong><br>
<code>towupper</code>, <code>towupper_l</code> return the uppercase equivalent of <var>c</var> when it is a
lowercase wide character, otherwise, it returns the input character.
</p>
<br>
<p><strong>Portability</strong><br>
<code>towupper</code> is C99.
<code>towupper_l</code> is POSIX-1.2008.
</p>
<p>No supporting OS subroutines are required.
</p>
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