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34.Dd $Mdocdate: June 5 2013 $
35.Dt MODF 3
36.Os
37.Sh NAME
38.Nm modf ,
39.Nm modff ,
40.Nm modfl
41.Nd extract signed integral and fractional values from floating-point number
42.Sh SYNOPSIS
43.In math.h
44.Ft double
45.Fn modf "double value" "double *iptr"
46.Ft float
47.Fn modff "float value" "float *iptr"
48.Ft long double
49.Fn modfl "long double value" "long double *iptr"
50.Sh DESCRIPTION
51The
52.Fn modf
53function breaks the argument
54.Fa value
55into integral and fractional parts, each of which has the
56same sign as the argument.
57It stores the integral part as a
58.Li double
59in the object pointed to by
60.Fa iptr .
61The
62.Fn modff
63function is a single precision version of
64.Fn modf .
65The
66.Fn modfl
67function is an extended precision version of
68.Fn modf .
69.Sh RETURN VALUES
70The
71.Fn modf ,
72.Fn modff
73and
74.Fn modfl
75functions return the signed fractional part of
76.Fa value .
77.Sh SEE ALSO
78.Xr frexp 3 ,
79.Xr ldexp 3
80.Sh STANDARDS
81The
82.Fn modf
83function conforms to
84.St -ansiC .
85