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FreeBSD 11.0 - man page for fabsl (freebsd section 3)

FABS(3) 						   BSD 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
The fabs(), fabsf() and fabsl() functions return the absolute value of x.
SEE ALSO
abs(3), ceil(3), floor(3), ieee(3), math(3), rint(3)
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'').
BSD
October 25, 2003 BSD