NAME

     infnan - deal with infinite or not-a-number (NaN) result

SYNOPSIS

     #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.

ERRORS
ERANGE The value of error is positive or negative infinity. EDOM The value of error is "not-a-number" (NaN).

CONFORMING TO
BSD 4.3