islessequal
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | 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. 
| Contents | 
[edit] Parameters
| x | - | floating point value | 
| y | - | floating point value | 
[edit] Return value
Nonzero integral value if x <= y, 0 otherwise
[edit] 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<=.
[edit] 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
[edit] See also
| (C99) | checks if the first floating-point argument is greater or equal than the second (function) | 
| C++ documentation for islessequal | |


