HUGE_VALF

From cppreference.com
< c‎ | numeric‎ | math
 
 
 
Common mathematical functions
Functions
Basic operations
(C99)
(C99)
(C99)
(C99)
(C99)
(C99)
(C99)(C99)(C99)
Exponential functions
(C99)
(C99)
(C99)
(C99)
Power functions
(C99)
(C99)
Trigonometric and hyperbolic functions
(C99)
(C99)
(C99)
Error and gamma functions
(C99)
(C99)
(C99)
(C99)
Nearest integer floating point operations
(C99)(C99)(C99)
(C99)
(C99)
(C99)(C99)(C99)
Floating point manipulation functions
(C99)(C99)
(C99)
(C99)
Classification
(C99)
(C99)
(C99)
(C99)
(C99)
(C99)
Macro constants
HUGE_VALFHUGE_VALHUGE_VALL
(C99)(C99)
 
Defined in header <math.h>
#define HUGE_VALF /*implementation defined*/
(since C99)
#define HUGE_VAL  /*implementation defined*/
#define HUGE_VALL /*implementation defined*/
(since C99)

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 (see math_errhandling).

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.

[edit] Example

#include <stdio.h>
#include <math.h>
 
int main(void)
{
    printf("HUGE_VALF = %f\n",  HUGE_VALF);
    printf("HUGE_VAL  = %f\n",  HUGE_VAL);
    printf("HUGE_VALL = %Lf\n", HUGE_VALL);
}

Possible output:

HUGE_VALF = inf
HUGE_VAL  = inf
HUGE_VALL = inf

[edit] See also

(C99)
evaluates to positive infinity or the value guaranteed to overflow a float
(macro constant)
C++ documentation for HUGE_VAL