NAME

fabs, fabsf, fabsl — floating-point absolute value functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
fabs(double x);

float
fabsf(float x);

long double
fabsl(long double x);

DESCRIPTION

The fabs(), fabsf() and fabsl() functions compute the absolute value of a floating-point number x.

RETURN VALUES

Functions of the fabs() family return the absolute value of x.

SEE ALSO

abs(3), ceil(3), floor(3), math(3), rint(3)

STANDARDS

The fabs() function conforms to ANSI X3.159-1989 (“ANSI C89”). The fabsf() and fabsl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).