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| <h3 class="section">1.57 <code>trunc</code>, <code>truncf</code>–round to integer, towards zero</h3> |
| |
| <p><a name="index-trunc-152"></a><a name="index-truncf-153"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double trunc(double <var>x</var>); |
| float truncf(float <var>x</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| The <code>trunc</code> functions round their argument to the integer value, in |
| floating format, nearest to but no larger in magnitude than the |
| argument, regardless of the current rounding direction. (While the |
| "inexact" floating-point exception behavior is unspecified by the C |
| standard, the <code>trunc</code> functions are written so that "inexact" is not |
| raised if the result does not equal the argument, which behavior is as |
| recommended by IEEE 754 for its related functions.) |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <var>x</var> truncated to an integral value. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| ANSI C, POSIX |
| |
| <p><br> |
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