INFNAN Section: Linux Programmer's Manual (3) Updated: June 2, 2025 Index   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   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO This document was created by using the manual pages. Time: 11:58:04 GMT, March 24, 2025