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| <h3 class="section">1.29 <code>infinity</code>, <code>infinityf</code>–representation of infinity</h3> |
| |
| <p><a name="index-infinity-77"></a><a name="index-infinityf-78"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double infinity(void); |
| float infinityf(void); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>infinity</code> and <code>infinityf</code> return the special number IEEE |
| infinity in double- and single-precision arithmetic |
| respectively. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>infinity</code> and <code>infinityf</code> are neither standard C nor POSIX. C and |
| POSIX require macros HUGE_VAL and HUGE_VALF to be defined in math.h, which |
| Newlib defines to be infinities corresponding to these archaic infinity() |
| and infinityf() functions in floating-point implementations which do have |
| infinities. |
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