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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
     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").

FreeBSD ports 15.1		October 25, 2003			 FABS(3)

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<https://man.freebsd.org/cgi/man.cgi?query=fabs&sektion=3&manpath=FreeBSD+15.1-RELEASE+and+Ports>

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