isnan
From cppreference.com
| Defined in header <math.h>
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| #define isnan(arg) /* implementation defined */
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(since C99) | |
Determines if the given floating point number arg is not-a-number (NaN). The macro returns an integral value.
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
Nonzero integral value if arg is NaN, 0 otherwise.
[edit] 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) |