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ISLESSGREATER(P)		    POSIX Programmer's Manual			 ISLESSGREATER(P)

NAME
       islessgreater - test if x is less than or greater than y

SYNOPSIS
       #include <math.h>

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

DESCRIPTION
       The  islessgreater()  macro  shall  determine  whether  its first argument is less than or
       greater than  its  second  argument.   The  islessgreater(  x,  y)  macro  is  similar  to
       (x) < (y) || (x) > (y);	however,  islessgreater( x, y) shall not raise the invalid float-
       ing-point exception when x and y are unordered (nor shall it evaluate x and y twice).

RETURN VALUE
       Upon  successful  completion,  the  islessgreater()  macro  shall  return  the  value   of
       (x) < (y) || (x) > (y).

       If x or y is NaN, 0 shall be returned.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION 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 may 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 NaNs without suffering the invalid floating-point exception. In the SYN-
       OPSIS section, real-floating indicates that the argument shall be an expression	of  real-
       floating type.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isgreater() , isgreaterequal() , isless() , islessequal() , isunordered() , the Base Defi-
       nitions volume of IEEE Std 1003.1-2001 <math.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				 ISLESSGREATER(P)
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