1.\" $OpenBSD: trunc.3,v 1.3 2007/05/31 19:19:36 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: May 31 2007 $ 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 48and 49.Fn truncf 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 56and 57.Fn rintf 58.\" .Fn rintl 59respectively, in the 60.Dv FE_TOWARDZERO 61rounding mode. 62.Sh SEE ALSO 63.Xr ceil 3 , 64.\" .Xr fesetround 3 65.Xr floor 3 , 66.Xr math 3 , 67.Xr nextafter 3 , 68.Xr rint 3 , 69.Xr round 3 70.Sh STANDARDS 71The 72.Fn trunc 73and 74.Fn truncf 75.\" .Fn truncl 76functions conform to 77.St -isoC-99 . 78