1.\" Copyright (c) 2003, Steven G. Kargl 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd April 7, 2005 28.Dt ROUND 3 29.Os 30.Sh NAME 31.Nm round , 32.Nm roundf , 33.Nm roundl 34.Nd round to nearest integral value 35.Sh LIBRARY 36.Lb libm 37.Sh SYNOPSIS 38.In math.h 39.Ft double 40.Fn round "double x" 41.Ft float 42.Fn roundf "float x" 43.Ft "long double" 44.Fn roundl "long double x" 45.Sh DESCRIPTION 46The 47.Fn round , 48.Fn roundf , 49and 50.Fn roundl 51functions return the nearest integral value to 52.Fa x ; 53if 54.Fa x 55lies halfway between two integral values, then these 56functions return the integral value with the larger 57absolute value (i.e., they round away from zero). 58.Sh SEE ALSO 59.Xr ceil 3 , 60.Xr floor 3 , 61.Xr ieee 3 , 62.Xr lrint 3 , 63.Xr lround 3 , 64.Xr math 3 , 65.Xr rint 3 , 66.Xr trunc 3 67.Sh STANDARDS 68These functions conform to 69.St -isoC-99 . 70.Sh HISTORY 71The 72.Fn round 73and 74.Fn roundf 75functions appeared in 76.Fx 5.3 . 77The 78.Fn roundl 79function appeared in 80.Fx 6.0 . 81