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| <h3 class="section">1.24 <code>fmod</code>, <code>fmodf</code>—floating-point remainder (modulo)</h3> |
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| <p><a name="index-fmod-59"></a><a name="index-fmodf-60"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double fmod(double <var>x</var>, double <var>y</var>) |
| float fmodf(float <var>x</var>, float <var>y</var>) |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| The <code>fmod</code> and <code>fmodf</code> functions compute the floating-point |
| remainder of <var>x</var>/<var>y</var> (<var>x</var> modulo <var>y</var>). |
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| <p><br> |
| <strong>Returns</strong><br> |
| The <code>fmod</code> function returns the value |
| <var>x</var>-<var>i</var>*<var>y</var>, |
| for the largest integer <var>i</var> such that, if <var>y</var> is nonzero, the |
| result has the same sign as <var>x</var> and magnitude less than the |
| magnitude of <var>y</var>. |
| |
| <p><code>fmod(</code><var>x</var><code>,0)</code> returns NaN, and sets <code>errno</code> to <code>EDOM</code>. |
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| <p>You can modify error treatment for these functions using <code>matherr</code>. |
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| <p><br> |
| <strong>Portability</strong><br> |
| <code>fmod</code> is ANSI C. <code>fmodf</code> is an extension. |
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