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91 lines
3.5 KiB
HTML
91 lines
3.5 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>nextafter (LIBM)</title>
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<meta name="description" content="nextafter (LIBM)">
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<meta name="keywords" content="nextafter (LIBM)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Math.html#Math" rel="up" title="Math">
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<link href="pow.html#pow" rel="next" title="pow">
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<link href="nearbyint.html#nearbyint" rel="prev" title="nearbyint">
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</head>
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<body lang="en">
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<a name="nextafter"></a>
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<div class="header">
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<p>
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Next: <a href="pow.html#pow" accesskey="n" rel="next">pow</a>, Previous: <a href="nearbyint.html#nearbyint" accesskey="p" rel="prev">nearbyint</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="nextafter_002c-nextafterf_002d_002d_002dget-next-number"></a>
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<h3 class="section">1.44 <code>nextafter</code>, <code>nextafterf</code>—get next number</h3>
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<a name="index-nextafter"></a>
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<a name="index-nextafterf"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <math.h>
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double nextafter(double <var>val</var>, double <var>dir</var>);
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float nextafterf(float <var>val</var>, float <var>dir</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>nextafter</code> returns the double-precision floating-point number
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closest to <var>val</var> in the direction toward <var>dir</var>. <code>nextafterf</code>
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performs the same operation in single precision. For example,
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<code>nextafter(0.0,1.0)</code> returns the smallest positive number which is
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representable in double precision.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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Returns the next closest number to <var>val</var> in the direction toward
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<var>dir</var>.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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Neither <code>nextafter</code> nor <code>nextafterf</code> is required by ANSI C
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or by the System V Interface Definition (Issue 2).
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</p>
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<br>
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</body>
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</html>
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