FABS(3) | Library Functions Manual | FABS(3)

# 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”).

March 17, 2016 | NetBSD 9.0