1.\" $OpenBSD: trunc.3,v 1.8 2013/08/14 06:32:29 jmc Exp $ 2.\" 3.\" Copyright (c) 2004, 2005 David Schultz <das@FreeBSD.org> 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 AUTHOR 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 AUTHOR 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/trunc.3,v 1.3 2005/06/15 19:04:04 ru Exp $ 28.\" 29.Dd $Mdocdate: August 14 2013 $ 30.Dt TRUNC 3 31.Os 32.Sh NAME 33.Nm trunc , 34.Nm truncf , 35.Nm truncl 36.Nd nearest integral value with magnitude less than or equal to |x| 37.Sh SYNOPSIS 38.In math.h 39.Ft double 40.Fn trunc "double x" 41.Ft float 42.Fn truncf "float x" 43.Ft long double 44.Fn truncl "long double x" 45.Sh DESCRIPTION 46The 47.Fn trunc , 48.Fn truncf 49and 50.Fn truncl 51functions return the nearest integral value with magnitude less than 52or equal to 53.Pf | Fa x Ns | . 54They are equivalent to 55.Fn rint , 56.Fn rintf 57and 58.Fn rintl 59respectively, in the rounding towards zero mode. 60.Sh SEE ALSO 61.Xr ceil 3 , 62.Xr fesetround 3 , 63.Xr floor 3 , 64.Xr nextafter 3 , 65.Xr rint 3 , 66.Xr round 3 67.Sh STANDARDS 68The 69.Fn trunc , 70.Fn truncf 71and 72.Fn truncl 73functions conform to 74.St -isoC-99 . 75