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fmin, fminf, fminl

From cppreference.com
< c‎ | numeric‎ | math
 
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Defined in header <math.h>
float       fminf( float x, float y );
 (1) (since C99)
double      fmin( double x, double y );
 (2) (since C99)
long double fminl( long double x, long double y );
 (3) (since C99)
Defined in header <tgmath.h>
#define fmin( x, y )
 (4) (since C99)
1-3) Returns the smaller of two floating-point arguments, treating NaNs as missing data (between a NaN and a numeric value, the numeric value is chosen).
4) Type-generic macro: If any argument has type long double, fminl is called. Otherwise, if any argument has integer type or has type double, fmin is called. Otherwise, fminf is called.

Contents

[edit] Parameters

x, y - floating-point values

[edit] Return value

If successful, returns the smaller of two floating-point values. The value returned is exact and does not depend on any rounding modes.

[edit] Error handling

This function is not subject to any of the error conditions specified in math_errhandling.

If the implementation supports IEEE floating-point arithmetic (IEC 60559),

  • If one of the two arguments is NaN, the value of the other argument is returned
  • Only if both arguments are NaN, NaN is returned

[edit] Notes

This function is not required to be sensitive to the sign of zero, although some implementations additionally enforce that if one argument is +0 and the other is -0, then -0 is returned.

[edit] Example

Run this code
#include <math.h>
#include <stdio.h>
 
int main(void)
{
    printf("fmin(2,1)    = %f\n", fmin(2, 1));
    printf("fmin(-Inf,0) = %f\n", fmin(-INFINITY, 0));
    printf("fmin(NaN,-1) = %f\n", fmin(NAN, -1));
}

Possible output: 

fmin(2,1)    = 1.000000
fmin(-Inf,0) = -inf
fmin(NaN,-1) = -1.000000

[edit] References

  • C23 standard (ISO/IEC 9899:2024):
  • 7.12.12.3 The fmin functions (p: TBD)
  • 7.25 Type-generic math <tgmath.h> (p: TBD)
  • F.10.9.3 The fmin functions (p: TBD)
  • C17 standard (ISO/IEC 9899:2018):
  • 7.12.12.3 The fmin functions (p: TBD)
  • 7.25 Type-generic math <tgmath.h> (p: TBD)
  • F.10.9.3 The fmin functions (p: TBD)
  • C11 standard (ISO/IEC 9899:2011):
  • 7.12.12.3 The fmin functions (p: 258)
  • 7.25 Type-generic math <tgmath.h> (p: 373-375)
  • F.10.9.3 The fmin functions (p: 530)
  • C99 standard (ISO/IEC 9899:1999):
  • 7.12.12.3 The fmin functions (p: 239)
  • 7.22 Type-generic math <tgmath.h> (p: 335-337)
  • F.9.9.3 The fmin functions (p: 466)

[edit] See also

(C99)
 checks if the first floating-point argument is less than the second
(function macro) [edit]
(C99)(C99)(C99)
 determines larger of two floating-point values
(function) [edit]
C++ documentation for fmin
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