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FABS(3)
FABS(3) FreeBSD Library Functions Manual FABS(3)

NAME

fabs, fabsf, fabslfloating-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

The fabs(), fabsf() and fabsl() functions return the absolute value of x.

STANDARDS

The fabs() function conforms to ISO/IEC 9899:1990 (“ISO C90”). The fabsf() and fabsl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).
October 25, 2003 FreeBSD