ISLESSEQUAL(3M) Mathematical Library Functions ISLESSEQUAL(3M)
NAME
islessequal - test if x is less than or equal to y
SYNOPSIS
c99 [
flag... ]
file...
-lm [
library... ]
#include <math.h>
int islessequal(
real-floating x,
real-floating y);
DESCRIPTION
The
islessequal() macro determines whether its first argument is less
than or equal to its second argument. The value of
islessequal(
x,
y)
is equal to (
x) <= (
y); however, unlike (
x) <= (
y),
islessequal(
x,
y)
does not raise the invalid floating-point exception when
x and
y are
unordered.
RETURN VALUES
Upon successful completion, the
islessequal() macro returns the value
of (
x) <= (
y).
If
x or
y is NaN, 0 is returned.
ERRORS
No errors are defined.
USAGE
The relational and equality operators support the usual mathematical
relationships between numeric values. For any ordered pair of numeric
values, exactly one of the relationships (less, greater, and equal)
is true. Relational operators can raise the invalid floating-point
exception when argument values are NaNs. For a NaN and a numeric
value, or for two NaNs, just the unordered relationship is true. This
macro is a quiet (non-floating-point exception raising) version of a
relational operator. It facilitates writing efficient code that
accounts for quiet NaNs without suffering the invalid floating-point
exception. In the
SYNOPSIS section,
real-floating indicates that the
argument is an expression of
real-floating type.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
math.h(3HEAD),
isgreater(3M),
isgreaterequal(3M),
isless(3M),
islessgreater(3M),
isunordered(3M),
attributes(7),
standards(7)SunOS 5.11 July 12, 2006 ISLESSEQUAL(3M)
