| .\" Copyright (c) 1991 The Regents of the University of California. |
| .\" All rights reserved. |
| .\" |
| .\" Redistribution and use in source and binary forms, with or without |
| .\" modification, are permitted provided that the following conditions |
| .\" are met: |
| .\" 1. Redistributions of source code must retain the above copyright |
| .\" notice, this list of conditions and the following disclaimer. |
| .\" 2. Redistributions in binary form must reproduce the above copyright |
| .\" notice, this list of conditions and the following disclaimer in the |
| .\" documentation and/or other materials provided with the distribution. |
| .\" 3. All advertising materials mentioning features or use of this software |
| .\" must display the following acknowledgement: |
| .\" This product includes software developed by the University of |
| .\" California, Berkeley and its contributors. |
| .\" 4. Neither the name of the University nor the names of its contributors |
| .\" may be used to endorse or promote products derived from this software |
| .\" without specific prior written permission. |
| .\" |
| .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| .\" SUCH DAMAGE. |
| .\" |
| .\" from: @(#)fmod.3 5.1 (Berkeley) 5/2/91 |
| .\" $FreeBSD: src/lib/msun/man/fmod.3,v 1.8 2001/10/13 12:23:23 bde Exp $ |
| .\" |
| .Dd May 2, 1991 |
| .Dt FMOD 3 |
| .Os |
| .Sh NAME |
| .Nm fmod , |
| .Nm fmodf |
| .Nd floating-point remainder functions |
| .Sh LIBRARY |
| .Lb libm |
| .Sh SYNOPSIS |
| .In math.h |
| .Ft double |
| .Fn fmod "double x" "double y" |
| .Ft float |
| .Fn fmodf "float x" "float y" |
| .Sh DESCRIPTION |
| The |
| .Fn fmod |
| and the |
| .Fn fmodf |
| functions compute the floating-point remainder of |
| .Fa x Ns / Fa y . |
| .Sh RETURN VALUES |
| The |
| .Fn fmod |
| and the |
| .Fn fmodf |
| functions return the value |
| .Sm off |
| .Fa x - Em i * Fa y , |
| .Sm on |
| for some integer |
| .Em i |
| such that, if |
| .Fa y |
| is non-zero, the result has the same sign as |
| .Fa x |
| and magnitude less than the magnitude of |
| .Fa y . |
| If |
| .Fa y |
| is zero, whether a domain error occurs or the |
| .Fn fmod |
| and the |
| .Fn fmodf |
| function returns zero is implementation-defined. |
| .Sh SEE ALSO |
| .Xr math 3 |
| .Sh STANDARDS |
| The |
| .Fn fmod |
| function conforms to |
| .St -isoC . |