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Defined in header <math.h> | ||
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#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.
x | - | floating point value |
---|---|---|
y | - | floating point value |
Nonzero integral value if x <= y
, 0
otherwise.
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<=
.
#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) = 0islessequal(1.0,2.0) = 1islessequal(1.0,1.0) = 1islessequal(INFINITY,1.0) = 0islessequal(1.0,NAN) = 0
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)
isgreaterequal (C99) | checks if the first floating-point argument is greater or equal than the second (function) |
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| C++ documentation for islessequal |
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