/C

# fmin, fminf, fminl

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.

### Parameters

 x, y - floating point values

### 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.

### 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

### 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.

### Example

```#include <stdio.h>
#include <math.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```

### References

• 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)