islessequal
islessequal
| Defined in header | | |
|---|---|---|
| #define islessequal(x, y) /* implementation defined */ | | (since C99) |
Determines if the floating point number x is less than or equal to the floating-point number y, without setting floating-point exceptions.
Parameters
| x | - | floating point value |
|---|---|---|
| y | - | floating point value |
Return value
Nonzero integral value if x <= y, 0 otherwise.
Notes
The built-in operator<= for floating-point numbers may raise FE_INVALID if one or both of the arguments is NaN. This function is a "quiet" version of operator<=.
Example
#include <stdio.h>
#include <math.h>
int main(void)
{
printf("islessequal(2.0,1.0) = %d\n", islessequal(2.0,1.0)
printf("islessequal(1.0,2.0) = %d\n", islessequal(1.0,2.0)
printf("islessequal(1.0,1.0) = %d\n", islessequal(1.0,1.0)
printf("islessequal(INFINITY,1.0) = %d\n", islessequal(INFINITY,1.0)
printf("islessequal(1.0,NAN) = %d\n", islessequal(1.0,NAN)
return 0;
}
Possible output:
islessequal(2.0,1.0) = 0
islessequal(1.0,2.0) = 1
islessequal(1.0,1.0) = 1
islessequal(INFINITY,1.0) = 0
islessequal(1.0,NAN) = 0
References
- C11 standard (ISO/IEC 9899:2011):
See also
| isgreaterequal (C99) | checks if the first floating-point argument is greater or equal than the second (function) |
|---|
| C++ documentation for islessequal |
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