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 November 29, 2003 28.Dt ROUND 3 29.Os 30.Sh NAME 31.Nm round , 32.Nm roundf 33.Nd round to nearest integral value 34.Sh LIBRARY 35.Lb libm 36.Sh SYNOPSIS 37.In math.h 38.Ft double 39.Fn round "double x" 40.Ft float 41.Fn roundf "float x" 42.Sh DESCRIPTION 43The 44.Fn round 45and 46.Fn roundf 47functions return the nearest integral value to 48.Fa x ; 49if 50.Fa x 51lies halfway between two integral values, then these 52functions return the integral value with the larger 53absolute value (i.e., they round away from zero). 54.Sh SEE ALSO 55.Xr ceil 3 , 56.Xr floor 3 , 57.Xr ieee 3 , 58.Xr lrint 3 , 59.Xr lround 3 , 60.Xr math 3 , 61.Xr rint 3 , 62.Xr trunc 3 63.Sh STANDARDS 64The 65.Fn round 66function conforms to 67.St -isoC-99 . 68.Sh HISTORY 69The 70.Fn round 71and 72.Fn roundf 73functions appeared in 74.Fx 5.3 . 75