isnan
From cppreference.com
Template:c/numeric/math/sidebar
| Defined in header <math.h>
|
||
| #define isnan(arg) /* implementation defined */ |
(since C99) | |
Determines if the given floating point number arg is not-a-number (NaN). The macro returns an integral value.
Parameters
| arg | - | floating point value |
Return value
Nonzero integral value if arg is NaN, 0 otherwise.
See also
| (C99) |
categorizes the given floating point value (function) |
| (C99) |
checks if the given number has finite value (function) |
| (C99) |
checks if the given number is infinite (function) |
| (C99) |
checks if the given number is normal (function) |
| C++ documentation for isnan
| |
