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100 lines
3.8 KiB
HTML
100 lines
3.8 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>lround (LIBM)</title>
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<meta name="description" content="lround (LIBM)">
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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="modf.html#modf" rel="next" title="modf">
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<body lang="en">
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<a name="lround"></a>
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<div class="header">
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<p>
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Next: <a href="modf.html#modf" accesskey="n" rel="next">modf</a>, Previous: <a href="lrint.html#lrint" accesskey="p" rel="prev">lrint</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="lround_002c-lroundf_002c-llround_002c-llroundf_002d_002d_002dround-to-integer_002c-to-nearest"></a>
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<h3 class="section">1.40 <code>lround</code>, <code>lroundf</code>, <code>llround</code>, <code>llroundf</code>—round to integer, to nearest</h3>
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<a name="index-lround"></a>
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<a name="index-lroundf"></a>
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<a name="index-llround"></a>
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<a name="index-llroundf"></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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long int lround(double <var>x</var>);
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long int lroundf(float <var>x</var>);
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long long int llround(double <var>x</var>);
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long long int llroundf(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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The <code>lround</code> and <code>llround</code> functions round their argument to the
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nearest integer value, rounding halfway cases away from zero, regardless
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of the current rounding direction. If the rounded value is outside the
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range of the return type, the numeric result is unspecified (depending
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upon the floating-point implementation, not the library). A range
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error may occur if the magnitude of x is too large.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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<var>x</var> rounded to an integral value as an integer.
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</p>
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<br>
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<p><strong>See Also</strong><br>
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See the <code>round</code> functions for the return being the same floating-point type
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as the argument. <code>lrint</code>, <code>llrint</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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