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| <h3 class="section">1.18 <code>fabs</code>, <code>fabsf</code>—absolute value (magnitude)</h3> |
| |
| <p><a name="index-fabs-45"></a><a name="index-fabsf-46"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double fabs(double <var>x</var>); |
| float fabsf(float <var>x</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>fabs</code> and <code>fabsf</code> calculate |
| the absolute value (magnitude) of the argument <var>x</var>, by direct |
| manipulation of the bit representation of <var>x</var>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The calculated value is returned. No errors are detected. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>fabs</code> is ANSI. |
| <code>fabsf</code> is an extension. |
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