|INFNAN(3)||Linux Programmer's Manual||INFNAN(3)|
NAME¶infnan - deal with infinite or not-a-number (NaN) result
#include <math.h> double infnan(int error);
DESCRIPTION¶The infnan() function returns a suitable value for infinity and "not-a-number" (NaN) results. The value of error can be ERANGE to represent infinity or anything else to represent NaN. errno is also set.
RETURN VALUE¶If error is ERANGE (Infinity), HUGE_VAL is returned.
If error is -ERANGE (-Infinity), -HUGE_VAL is returned.
If error is anything else, NAN is returned.
- The value of error is positive or negative infinity.
- The value of error is "not-a-number" (NaN).
CONFORMING TO¶BSD 4.3
|June 2, 1993||GNU|