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<a name="floor"></a>
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<p>
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Next: <a href="fma.html#fma" accesskey="n" rel="next">fma</a>, Previous: <a href="fdim.html#fdim" accesskey="p" rel="prev">fdim</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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<a name="floor_002c-floorf_002c-ceil_002c-ceilf_002d_002d_002dfloor-and-ceiling"></a>
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<h3 class="section">1.21 <code>floor</code>, <code>floorf</code>, <code>ceil</code>, <code>ceilf</code>—floor and ceiling</h3>
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<a name="index-floor"></a>
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<a name="index-floorf"></a>
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<a name="index-ceil"></a>
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<a name="index-ceilf"></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 floor(double <var>x</var>);
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float floorf(float <var>x</var>);
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double ceil(double <var>x</var>);
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float ceilf(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>floor</code> and <code>floorf</code> find
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the nearest integer less than or equal to <var>x</var>.
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<code>ceil</code> and <code>ceilf</code> find
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the nearest integer greater than or equal to <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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<code>floor</code> and <code>ceil</code> return the integer result as a double.
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<code>floorf</code> and <code>ceilf</code> return the integer result as a float.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>floor</code> and <code>ceil</code> are ANSI.
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<code>floorf</code> and <code>ceilf</code> are extensions.
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