xref: /minix/lib/libm/man/fmod.3 (revision 84d9c625)
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28.\"     from: @(#)fmod.3	5.1 (Berkeley) 5/2/91
29.\"	$NetBSD: fmod.3,v 1.12 2013/11/12 16:48:39 joerg Exp $
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31.Dd November 12, 2013
32.Dt FMOD 3
33.Os
34.Sh NAME
35.Nm fmod ,
36.Nm fmodf ,
37.Nm fmodl
38.Nd floating-point remainder function
39.Sh LIBRARY
40.Lb libm
41.Sh SYNOPSIS
42.In math.h
43.Ft double
44.Fn fmod "double x" "double y"
45.Ft float
46.Fn fmodf "float x" "float y"
47.Ft long double
48.Fn fmodl "long double x" "long double y"
49.Sh DESCRIPTION
50The
51.Fn fmod
52function computes the floating-point remainder of
53.Fa x Ns / Fa y .
54.Sh RETURN VALUES
55The
56.Fn fmod ,
57.Fn fmodf ,
58and
59.Fn fmodl
60functions return the value
61.Sm off
62.Fa x - Em i * Fa y ,
63.Sm on
64for some integer
65.Em i
66such that, if
67.Fa y
68is non-zero, the result has the same sign as
69.Fa x
70and magnitude less than the magnitude of
71.Fa y .
72If
73.Fa y
74is zero, whether a domain error occurs or the
75.Fn fmod
76function returns zero is implementation-defined.
77.Sh SEE ALSO
78.Xr math 3
79.Sh STANDARDS
80The
81.Fn fmod
82function conforms to
83.St -ansiC .
84