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HUGE_VALF, HUGE_VAL, HUGE_VALL

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.

-

Example

#include <math.h>
-#include <stdio.h>
- 
-int main(void)
-{
-    const double result = 1.0 / 0.0;
-    printf("1.0/0.0 == %f\n", result);
-    if (result == HUGE_VAL)
-        puts("1.0/0.0 == HUGE_VAL");
-}

Possible output:

-
1.0/0.0 == inf
-1.0/0.0 == HUGE_VAL

References

See also

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

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/math/HUGE_VAL -

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