HUGE_VALF

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Defined in header <cmath>
#define HUGE_VALF /*implementation defined*/		(since C++11)
#define HUGE_VAL  /*implementation defined*/
#define HUGE_VALL /*implementation defined*/		(since C++11)

The HUGE_VALF, HUGE_VAL and HUGE_VALL macros expand to positive floating point constant expressions which compare equal to the values returned by floating-point functions and operators in case of overflow.

Constant	Explanation
HUGE_VALF	Expands to positive float expression that indicates overflow
HUGE_VAL	Expands to positive double expression that indicates overflow, not necessarily representable as a float
HUGE_VALL	Expands to positive long double expression that indicates overflow, not necessarily representable as a float or double

On implementations that support floating-point infinities, these macros always expand to the positive infinities of float, double, and long double, respectively.