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 floating-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  SYNOPSIS  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  Definitions  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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                      ISLESSGREATER(P)