# isless(3m) [sunos man page]

```isless(3M)						  Mathematical Library Functions						isless(3M)

NAME
isless - test if x is less than y

SYNOPSIS
#include <math.h>

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

DESCRIPTION
The  isless()  macro  determines  whether its first argument is less than its second argument.  The value of isless(x, y) is equal to (x) <
(y); however, unlike (x) < (y), isless(x, y) does not raise the invalid floating-point exception when x and y are unordered.

RETURN VALUES
Upon successful completion, the isless() 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(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+

isgreater(3M), isgreaterequal(3M), islessequal(3M), islessgreater(3M), isunordered(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    1 Nov 2003								isless(3M)```

## Check Out this Related Man Page

```isgreater(3M)						  Mathematical Library Functions					     isgreater(3M)

NAME
isgreater - test if x greater than y

SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>

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

DESCRIPTION
The  isgreater()  macro determines whether its first argument is greater than its second argument. The value of isgreater(x, y) is equal to
(x) > (y); however, unlike (x) > (y), isgreater(x, y) does not raise the invalid floating-point exception when x and y are unordered.

RETURN VALUES
Upon successful completion, the isgreater() 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(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+