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90 lines
3.3 KiB
HTML
90 lines
3.3 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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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>exp2 (LIBM)</title>
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<meta name="description" content="exp2 (LIBM)">
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<meta name="keywords" content="exp2 (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="expm1.html#expm1" rel="next" title="expm1">
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</head>
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<body lang="en">
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<a name="exp2"></a>
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<div class="header">
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<p>
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Next: <a href="expm1.html#expm1" accesskey="n" rel="next">expm1</a>, Previous: <a href="exp10.html#exp10" accesskey="p" rel="prev">exp10</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="exp2_002c-exp2f_002d_002d_002dexponential_002c-base-2"></a>
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<h3 class="section">1.17 <code>exp2</code>, <code>exp2f</code>—exponential, base 2</h3>
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<a name="index-exp2"></a>
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<a name="index-exp2f"></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 exp2(double <var>x</var>);
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float exp2f(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>exp2</code> and <code>exp2f</code> calculate 2 ^ <var>x</var>, that is,
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2 raised to the power <var>x</var>.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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On success, <code>exp2</code> and <code>exp2f</code> return the calculated value.
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If the result underflows, the returned value is <code>0</code>. If the
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result overflows, the returned value is <code>HUGE_VAL</code>. In
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either case, <code>errno</code> is set to <code>ERANGE</code>.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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ANSI C, POSIX.
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</p>
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<br>
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</body>
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</html>
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