xref: /freebsd/lib/msun/man/fmod.3 (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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32.\"     from: @(#)fmod.3	5.1 (Berkeley) 5/2/91
33.\" $FreeBSD$
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35.Dd May 2, 1991
36.Dt FMOD 3
37.Os
38.Sh NAME
39.Nm fmod ,
40.Nm fmodf
41.Nd floating-point remainder functions
42.Sh SYNOPSIS
43.Fd #include <math.h>
44.Ft double
45.Fn fmod "double x" "double y"
46.Ft float
47.Fn fmodf "float x" "float y"
48.Sh DESCRIPTION
49The
50.Fn fmod
51and the
52.Fn fmodf
53functions compute the floating-point remainder of
54.Fa x Ns / Fa y .
55.Sh RETURN VALUES
56The
57.Fn fmod
58and the
59.Fn fmodf
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
76and the
77.Fn fmodf
78function returns zero is implementation-defined.
79.Sh SEE ALSO
80.Xr math 3
81.Sh STANDARDS
82The
83.Fn fmod
84function conforms to
85.St -isoC .
86