islessequal
From cppreference.com
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islessequal
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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.
[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 <math.h> #include <stdio.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] References
- C23 standard (ISO/IEC 9899:2024):
- 7.12.14.4 The islessequal macro (p: TBD)
- F.10.11 Comparison macros (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.12.14.4 The islessequal macro (p: TBD)
- F.10.11 Comparison macros (p: TBD)
- 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)
[edit] See also
(C99)
(function macro) [edit]
C++ documentation for islessequal