fmax(3) Library Functions Manual fmax(3)

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

Math library (libm, -lm)

#include <math.h>
double fmax(double x, double y);
float fmaxf(float x, float y);
long double fmaxl(long double x, long double y);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

fmax(), fmaxf(), fmaxl():

    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

These functions return the larger value of x and y.

These functions return the maximum of x and y.

If one argument is a NaN, the other argument is returned.

If both arguments are NaN, a NaN is returned.

No errors occur.

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
fmax (), fmaxf (), fmaxl () Thread safety MT-Safe

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.

fdim(3), fmin(3)

2024-05-02 Linux man-pages 6.8