1.\" Copyright (c) 1991 The Regents of the University of California. 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.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" from: @(#)ceil.3 5.1 (Berkeley) 5/2/91 29.\" $NetBSD: ceil.3,v 1.18 2011/04/16 05:48:50 jruoho Exp $ 30.\" 31.Dd April 16, 2011 32.Dt CEIL 3 33.Os 34.Sh NAME 35.Nm ceil , 36.Nm ceilf , 37.Nm floor , 38.Nm floorf 39.Nd ceiling and floor 40.Sh LIBRARY 41.Lb libm 42.Sh SYNOPSIS 43.In math.h 44.Ft double 45.Fn ceil "double x" 46.Ft float 47.Fn ceilf "float x" 48.Ft double 49.Fn floor "double x" 50.Ft float 51.Fn floorf "float x" 52.Sh DESCRIPTION 53The 54.Fn ceil 55and 56.Fn ceilf 57functions return the smallest integral value 58greater than or equal to 59.Fa x . 60Conversely, the 61.Fn floor 62and 63.Fn floorf 64functions return the largest integral value 65less than or equal to 66.Fa x . 67.Sh SEE ALSO 68.Xr abs 3 , 69.Xr fabs 3 , 70.Xr math 3 , 71.Xr nextafter 3 , 72.Xr rint 3 73.Sh STANDARDS 74The described functions conform to 75.St -isoC-99 . 76.Sh BUGS 77The 78.Vt long double 79variants of the functions are not yet supported. 80