1.\" Copyright (c) 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" @(#)fabs.3 8.1 (Berkeley) 06/04/93 5.\" %sccs.include.redist.man% 6.\" 7.\" @(#)fabs.3 8.1 (Berkeley) 06/04/93 8.\" 9.Dd 10.Dt FABS 3 11.Os 12.Sh NAME 13.Nm fabs 14.Nd floating-point absolute value function 15.Sh SYNOPSIS 16.Fd #include <math.h> 17.Ft double 18.Fn fabs "double x" 19.Sh DESCRIPTION 20The 21.Fn fabs 22function computes the absolute value of a floating-point number 23.Fa x . 24.Sh RETURN VALUES 25The 26.Fn fabs 27function returns the absolute value of 28.Fa x . 29.Sh SEE ALSO 30.Xr abs 3 , 31.Xr ceil 3 , 32.Xr floor 3 , 33.Xr rint 3 , 34.Xr ieee 3 , 35.Xr math.3 36.Sh STANDARDS 37The 38.Fn fabs 39function conforms to 40.St -ansiC . 41