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      HUGE_VALF, HUGE_VAL, HUGE_VALL

      From cppreference.com
      <c‎ |numeric‎ |math
       
       
       
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      HUGE_VALHUGE_VALFHUGE_VALLHUGE_VALDN
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      Defined in header<math.h>
      #define HUGE_VALF /*implementation defined*/
      		(since C99)
      #define HUGE_VAL  /*implementation defined*/
      #define HUGE_VALL /*implementation defined*/
      		(since C99)

      TheHUGE_VALF,HUGE_VAL andHUGE_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 (seemath_errhandling).

      Constant Explanation
      HUGE_VALF Expands to positivefloat expression that indicates overflow
      HUGE_VAL Expands to positivedouble expression that indicates overflow, not necessarily representable as afloat
      HUGE_VALL Expands to positivelongdouble expression that indicates overflow, not necessarily representable as afloat ordouble

      On implementations that support floating-point infinities, these macros always expand to the positive infinities offloat,double, andlongdouble, respectively.

      [edit]Example

      Run this code
      #include <math.h>#include <stdio.h> int main(void){constdouble 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 == inf1.0/0.0 == HUGE_VAL

      [edit]References

      • C23 standard (ISO/IEC 9899:2024):
      • 7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: TBD)
      • F.10/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: TBD)
      • C17 standard (ISO/IEC 9899:2018):
      • 7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: TBD)
      • F.10/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: TBD)
      • C11 standard (ISO/IEC 9899:2011):
      • 7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 231)
      • F.10/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 517)
      • C99 standard (ISO/IEC 9899:1999):
      • 7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 212)
      • F.9/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 454)
      • C89/C90 standard (ISO/IEC 9899:1990):
      • 4.5 HUGE_VAL

      [edit]See also

      evaluates to positive infinity or the value guaranteed to overflow afloat
      (macro constant)[edit]
      C++ documentation forHUGE_VAL
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=c/numeric/math/HUGE_VAL&oldid=172024"
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