2011-03-18 16:52:16 +01:00
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.\" Copyright (c) 1991 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)fmod.3 5.1 (Berkeley) 5/2/91
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2013-12-06 12:04:52 +01:00
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.\" $NetBSD: fmod.3,v 1.12 2013/11/12 16:48:39 joerg Exp $
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2011-03-18 16:52:16 +01:00
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.\"
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2013-12-06 12:04:52 +01:00
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.Dd November 12, 2013
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2011-03-18 16:52:16 +01:00
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.Dt FMOD 3
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.Os
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.Sh NAME
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.Nm fmod ,
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.Nm fmodf ,
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.Nm fmodl
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2011-03-18 16:52:16 +01:00
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.Nd floating-point remainder function
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.Sh LIBRARY
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.Lb libm
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.Sh SYNOPSIS
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.In math.h
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.Ft double
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.Fn fmod "double x" "double y"
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.Ft float
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.Fn fmodf "float x" "float y"
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.Ft long double
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.Fn fmodl "long double x" "long double y"
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.Sh DESCRIPTION
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The
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.Fn fmod
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function computes the floating-point remainder of
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.Fa x Ns / Fa y .
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.Sh RETURN VALUES
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The
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.Fn fmod ,
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.Fn fmodf ,
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and
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.Fn fmodl
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functions return the value
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.Sm off
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.Fa x - Em i * Fa y ,
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.Sm on
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for some integer
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.Em i
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such that, if
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.Fa y
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is non-zero, the result has the same sign as
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.Fa x
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and magnitude less than the magnitude of
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.Fa y .
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If
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.Fa y
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is zero, whether a domain error occurs or the
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.Fn fmod
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function returns zero is implementation-defined.
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.Sh SEE ALSO
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.Xr math 3
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.Sh STANDARDS
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The
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.Fn fmod
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function conforms to
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.St -ansiC .
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