fabs(3) BSD Library Functions Manual fabs(3)
NAME
fabs -- floating-point absolute value function
SYNOPSIS
#include <math.h>
double
fabs(double x);
long double
fabsl(long double x);
float
fabsf(float x);
DESCRIPTION
The fabs() functions compute the absolute value of a floating-point num-
ber x.
SPECIAL VALUES
fabs(+-0) returns 0.
fabs(+-infinity) returns +infinity.
VECTOR OPERATIONS
If you need to apply the fabs() function to SIMD vectors or arrays, using
the following functions provided by the Accelerate.framework may give
significantly better performance:
#include <Accelerate/Accelerate.h>
vFloat vfabsf(vFloat x);
void vvfabsf( float *y, const float *x, const int *n);
void vvfabs(double *y, const double *x, const int *n);
SEE ALSO
abs(3), ceil(3), floor(3), rint(3), math(3)
STANDARDS
The fabs() functions conform to ISO/IEC 9899:2011.
BSD December 11, 2006 BSD
Mac OS X 10.9.1 - Generated Tue Jan 7 19:40:57 CST 2014