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| <h3 class="section">1.42 <code>nan</code>, <code>nanf</code>—representation of “Not a Number”</h3> |
| |
| <p><a name="index-nan-119"></a><a name="index-nanf-120"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double nan(const char *); |
| float nanf(const char *); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>nan</code> and <code>nanf</code> return an IEEE NaN (Not a Number) in |
| double- and single-precision arithmetic respectively. The |
| argument is currently disregarded. |
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