1.\" $NetBSD: round.3,v 1.6 2011/09/13 07:11:43 njoly Exp $ 2.\" 3.\" Copyright (c) 2003, Steven G. Kargl 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/lib/msun/man/round.3,v 1.2 2004/06/20 09:27:17 das Exp $ 28.\" 29.Dd July 15, 2004 30.Dt ROUND 3 31.Os 32.Sh NAME 33.Nm round , 34.Nm roundf 35.Nd round to nearest integral value 36.Sh LIBRARY 37.Lb libm 38.Sh SYNOPSIS 39.In math.h 40.Ft double 41.Fn round "double x" 42.Ft float 43.Fn roundf "float x" 44.Sh DESCRIPTION 45The 46.Fn round 47and 48.Fn roundf 49functions return the nearest integral value to 50.Fa x ; 51if 52.Fa x 53lies halfway between two integral values, then these 54functions return the integral value with the larger 55absolute value (i.e., they round away from zero). 56.Sh SEE ALSO 57.Xr ceil 3 , 58.Xr floor 3 , 59.Xr math 3 , 60.Xr rint 3 , 61.Xr trunc 3 62.Sh STANDARDS 63The 64.Fn round 65and 66.Fn roundf 67functions conform to 68.St -isoC-99 . 69.Sh HISTORY 70The 71.Fn round 72and 73.Fn roundf 74functions appeared in 75.Nx 2.0 . 76