This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       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 .

IEEE/The Open Group                                   2017                                          FMAX(3POSIX)

       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.

       These  functions  shall  determine  the maximum numeric value of their arguments.  NaN arguments shall be
       treated as missing data: if one argument is a NaN and the  other  numeric,  then  these  functions  shall
       choose the numeric value.

       No errors are defined.

       Thefollowingsectionsareinformative.

       None.

       None.

       fmax, fmaxf, fmaxl — determine maximum numeric value of two floating-point numbers

       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.

       None.

       Upon successful completion, these functions shall return the maximum numeric value of their arguments.

       If just one argument is a NaN, the other argument shall be returned.

       If x and y are NaN, a NaN shall be returned.

fdim(), fmin()

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

       #include <math.h>

       double fmax(double x, double y);
       float fmaxf(float x, float y);
       long double fmaxl(long double x, long double y);