islessequal
| Defined in header <math.h>
|
||
| #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
Run this code
#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):
- 7.12.14.4 The islessequal macro (p: 260)
- F.10.11 Comparison macros (p: 531)
- C99 standard (ISO/IEC 9899:1999):
- 7.12.14.4 The islessequal macro (p: 241)
See also
| (C99) |
checks if the first floating-point argument is greater or equal than the second (function) |