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<a name="nextafter_002c-nextafterf_002d_002d_002dget-next-number"></a>
<h3 class="section">1.44 <code>nextafter</code>, <code>nextafterf</code>&mdash;get next number</h3>
<a name="index-nextafter"></a>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;math.h&gt;
double nextafter(double <var>val</var>, double <var>dir</var>);
float nextafterf(float <var>val</var>, float <var>dir</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>nextafter</code> returns the double-precision floating-point number
closest to <var>val</var> in the direction toward <var>dir</var>.  <code>nextafterf</code>
performs the same operation in single precision.  For example,
<code>nextafter(0.0,1.0)</code> returns the smallest positive number which is
representable in double precision.
</p>
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<p><strong>Returns</strong><br>
Returns the next closest number to <var>val</var> in the direction toward
<var>dir</var>.
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<p><strong>Portability</strong><br>
Neither <code>nextafter</code> nor <code>nextafterf</code> is required by ANSI C
or by the System V Interface Definition (Issue 2).
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