oracular (3) isgreater.3posix.gz

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PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.


NAME
       isgreater — test if x greater than y


SYNOPSIS
       #include <math.h>

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


DESCRIPTION
       The  functionality  described  on  this  reference  page is aligned with the ISO C standard. Any conflict
       between the requirements described  here  and  the  ISO C  standard  is  unintentional.  This  volume  of
       POSIX.1‐2017 defers to the ISO C standard.

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


RETURN VALUE
       Upon successful completion, the isgreater() macro shall return the value of (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
       isgreaterequal(), isless(), islessequal(), islessgreater(), isunordered()

       The Base Definitions volume of POSIX.1‐2017, <math.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .