HUGE_VAL, _HUGE
Syntax
#include <math.h>
Remarks
HUGE_VAL is the largest representable double value. This value is returned by many run-time math functions when an error occurs. For some functions, -HUGE_VAL is returned. HUGE_VAL is defined as the result of a floating-point product that is guaranteed to overflow. HUGE_VALF and HUGE_VALL are the largest representable float and long double typed values, respectively. The internal value _HUGE and the synonymous HUGE are defined similarly, but run-time math functions return HUGE_VAL. You should also use HUGE_VAL in your code for consistency.