NAME
fabs, fabsf,
fabsl —
floating-point absolute value
functions
SYNOPSIS
#include
<math.h>
double
fabs(double
x);
float
fabsf(float
x);
long double
fabsl(long
double x);
DESCRIPTION
The
fabs()
function computes the absolute value of a floating-point number
x. The
fabsf()
function is a single precision version of fabs().
The
fabsl()
function is an extended precision version of
fabs().
RETURN VALUES
The fabs(),
fabsf() and fabsl()
functions return the absolute value of x.
SEE ALSO
STANDARDS
The fabs() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
HISTORY
An fabs() function first appeared in
Version 6 AT&T UNIX.