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87 lines
3.3 KiB
HTML
87 lines
3.3 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<title>infinity (LIBM)</title>
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<meta name="description" content="infinity (LIBM)">
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<meta name="keywords" content="infinity (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="isgreater.html#isgreater" rel="next" title="isgreater">
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</head>
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<body lang="en">
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<a name="infinity"></a>
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<div class="header">
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<p>
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Next: <a href="isgreater.html#isgreater" accesskey="n" rel="next">isgreater</a>, Previous: <a href="ilogb.html#ilogb" accesskey="p" rel="prev">ilogb</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="infinity_002c-infinityf_002d_002d_002drepresentation-of-infinity"></a>
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<h3 class="section">1.30 <code>infinity</code>, <code>infinityf</code>—representation of infinity</h3>
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<a name="index-infinity"></a>
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<a name="index-infinityf"></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 infinity(void);
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float infinityf(void);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>infinity</code> and <code>infinityf</code> return the special number IEEE
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infinity in double- and single-precision arithmetic
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respectively.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>infinity</code> and <code>infinityf</code> are neither standard C nor POSIX. C and
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POSIX require macros HUGE_VAL and HUGE_VALF to be defined in math.h, which
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Newlib defines to be infinities corresponding to these archaic infinity()
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and infinityf() functions in floating-point implementations which do have
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infinities.
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</p>
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<br>
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</body>
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</html>
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