1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)abs.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libc/stdlib/abs.3,v 1.13 2007/01/09 00:28:09 imp Exp $ 34.\" $DragonFly: src/lib/libc/stdlib/abs.3,v 1.4 2007/12/02 03:29:47 swildner Exp $ 35.\" 36.Dd November 14, 2001 37.Dt ABS 3 38.Os 39.Sh NAME 40.Nm abs 41.Nd integer absolute value function 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In stdlib.h 46.Ft int 47.Fn abs "int j" 48.Sh DESCRIPTION 49The 50.Fn abs 51function 52computes 53the absolute value of the integer 54.Fa j . 55.Sh IMPLEMENTATION NOTES 56The 57.Fn abs 58function is thread-safe. 59It is not async-cancel-safe. 60.Sh RETURN VALUES 61The 62.Fn abs 63function 64returns 65the absolute value. 66.Sh SEE ALSO 67.Xr cabs 3 , 68.Xr fabs 3 , 69.Xr floor 3 , 70.Xr hypot 3 , 71.Xr imaxabs 3 , 72.Xr labs 3 , 73.Xr llabs 3 , 74.Xr math 3 75.Sh STANDARDS 76The 77.Fn abs 78function conforms to 79.St -isoC-99 . 80.Sh BUGS 81The absolute value of the most negative integer remains negative. 82