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+'\" t
+.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
+.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
+.\"     <mtk.manpages@gmail.com>
+.\"
+.\" SPDX-License-Identifier: GPL-1.0-or-later
+.\"
+.TH fmax 3 2023-07-20 "Linux man-pages 6.05.01"
+.SH NAME
+fmax, fmaxf, fmaxl \- determine maximum of two floating-point numbers
+.SH LIBRARY
+Math library
+.RI ( libm ", " \-lm )
+.SH SYNOPSIS
+.nf
+.B #include <math.h>
+.PP
+.BI "double fmax(double " x ", double " y );
+.BI "float fmaxf(float " x ", float " y );
+.BI "long double fmaxl(long double " x ", long double " y );
+.fi
+.PP
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.PP
+.BR fmax (),
+.BR fmaxf (),
+.BR fmaxl ():
+.nf
+    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
+.fi
+.SH DESCRIPTION
+These functions return the larger value of
+.I x
+and
+.IR y .
+.SH RETURN VALUE
+These functions return the maximum of
+.I x
+and
+.IR y .
+.PP
+If one argument is a NaN, the other argument is returned.
+.PP
+If both arguments are NaN, a NaN is returned.
+.SH ERRORS
+No errors occur.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR fmax (),
+.BR fmaxf (),
+.BR fmaxl ()
+T}	Thread safety	MT-Safe
+.TE
+.sp 1
+.SH STANDARDS
+C11, POSIX.1-2008.
+.SH HISTORY
+glibc 2.1.
+C99, POSIX.1-2001.
+.SH SEE ALSO
+.BR fdim (3),
+.BR fmin (3)