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<a name="iswalnum"></a>
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<a name="iswalnum_002d_002d_002dalphanumeric-wide-character-test"></a>
<h3 class="section">3.16 <code>iswalnum</code>&mdash;alphanumeric wide character test</h3>
<a name="index-iswalnum"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;wctype.h&gt;
int iswalnum(wint_t <var>c</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>iswalnum</code> is a function which classifies wide-character values that
are alphanumeric.
</p>
<br>
<p><strong>Returns</strong><br>
<code>iswalnum</code> returns non-zero if <var>c</var> is a alphanumeric wide character.
</p>
<br>
<p><strong>Portability</strong><br>
<code>iswalnum</code> is C99.
</p>
<p>No supporting OS subroutines are required.
</p>
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