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90 lines
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90 lines
3.4 KiB
HTML
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<a name="hypot"></a>
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<div class="header">
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<p>
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Next: <a href="ilogb.html#ilogb" accesskey="n" rel="next">ilogb</a>, Previous: <a href="gamma.html#gamma" accesskey="p" rel="prev">gamma</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="hypot_002c-hypotf_002d_002d_002ddistance-from-origin"></a>
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<h3 class="section">1.28 <code>hypot</code>, <code>hypotf</code>—distance from origin</h3>
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<a name="index-hypot"></a>
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<a name="index-hypotf"></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 hypot(double <var>x</var>, double <var>y</var>);
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float hypotf(float <var>x</var>, float <var>y</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>hypot</code> calculates the Euclidean distance
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<code>sqrt(<var>x</var>*<var>x</var> + <var>y</var>*<var>y</var>)</code>
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between the origin (0,0) and a point represented by the
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Cartesian coordinates (<var>x</var>,<var>y</var>). <code>hypotf</code> differs only
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in the type of its arguments and result.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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Normally, the distance value is returned. On overflow,
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<code>hypot</code> returns <code>HUGE_VAL</code> and sets <code>errno</code> to
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<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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<code>hypot</code> and <code>hypotf</code> are not ANSI C.
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</p><br>
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