The Open Group Base Specifications Issue 6

IEEE Std 1003.1, 2004 Edition

Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.A newer edition of this document exists here

#### NAME

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

#### SYNOPSIS

`#include <math.h>`

double fmax(double *x*`, double` *y*`);`

float fmaxf(float *x*`, float` *y*`);`

long double fmaxl(long double *x*`, long double` *y*`);`

#### DESCRIPTION

^{[CX]} 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 IEEE Std 1003.1-2001 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.

#### RETURN VALUE

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.

^{[MX]} If
*x* and *y* are NaN, a NaN shall be returned.

#### ERRORS

No errors are defined.

*The following sections are informative.*

#### EXAMPLES

None.

#### APPLICATION USAGE

None.

#### RATIONALE

None.

#### FUTURE DIRECTIONS

None.

#### SEE ALSO

*fdim*(), *fmin*(), the Base Definitions volume of
IEEE Std 1003.1-2001, *<math.h>*

#### CHANGE HISTORY

First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.

*End of informative text.*

UNIX ® is a registered Trademark of The Open Group.

POSIX ® is a registered Trademark of The IEEE.

[ Main Index | XBD | XCU | XSH | XRAT
]