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<a name="floor_002c-floorf_002c-ceil_002c-ceilf_002d_002d_002dfloor-and-ceiling"></a>
<h3 class="section">1.21 <code>floor</code>, <code>floorf</code>, <code>ceil</code>, <code>ceilf</code>&mdash;floor and ceiling</h3>
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<p><strong>Synopsis</strong>
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<pre class="example">#include &lt;math.h&gt;
double floor(double <var>x</var>);
float floorf(float <var>x</var>);
double ceil(double <var>x</var>);
float ceilf(float <var>x</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>floor</code> and <code>floorf</code> find 
the nearest integer less than or equal to <var>x</var>.
<code>ceil</code> and <code>ceilf</code> find 
the nearest integer greater than or equal to <var>x</var>.
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<p><strong>Returns</strong><br>
<code>floor</code> and <code>ceil</code> return the integer result as a double.
<code>floorf</code> and <code>ceilf</code> return the integer result as a float.
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<p><strong>Portability</strong><br>
<code>floor</code> and <code>ceil</code> are ANSI.
<code>floorf</code> and <code>ceilf</code> are extensions.
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