islessequal() — Determines if X is less than or equal to Y

Standards

Standards / Extensions	C or C++	Dependencies
C99 Single UNIX Specification, Version 3 C/C++ DFP C++ TR1 C99	both	z/OS V1R8

Format

#define _ISOC99_SOURCE
#include <math.h>

int islessequal(real-floating x, real-floating y);

#define __STDC_WANT_DEC_FP__
#include <math.h>

int islessequal(real-floating x, real-floating y);  /* C only */
int islessequal(decimal-floating x, decimal-floating y);  /* C only */
bool islessequal(real-floating x, real-floating y);  /* C++ only */
bool islessequal(decimal-floating x, decimal-floating y);  /* C++ only */

#define _TR1_C99
#include <math.h>

bool islessequal(real-floating x, real-floating y);  /* C++ only */

General description

The islessequal() macro or function template determines whether the argument x is less than or equal to y. It is equivalent to (x) <= (y), but no exception is raised if x or y are NaN.

Function	Hex	IEEE
islessequal	X	X

Notes:

To use IEEE decimal floating-point, the hardware must have the Decimal Floating-Point Facility installed.
This function works in IEEE decimal floating-point format. See "IEEE Decimal Floating-Point" for more information.

Returned value

The islessequal() macro returns 1 if the value of x is less than or equal to y, else returns 0. The C++ function template returns true if the value of x is less than or equal to y, else returns false.

Related information

math.h