.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Sat Jul 24 18:47:33 1993 by Rik Faith (faith@cs.unc.edu)
.TH MODF 3  "June 6, 1993" "" "Linux Programmer's Manual"
.SH NAME
modf \- extract signed integral and fractional values from floating-point
number
.SH SYNOPSIS
.nf
.B #include <math.h>
.sp
.BI "double modf(double " x ", double *" iptr );
.fi
.SH DESCRIPTION
The \fBmodf()\fP function breaks the argument \fIx\fP into an integral
part and a fractional part, each of which has the same sign as \fIx\fP.
The integral part is stored in \fIiptr\fP.
.SH "RETURN VALUE"
The \fBmodf()\fP function returns the fractional part of \fIx\fP.
.SH "CONFORMING TO"
SVID 3, POSIX, BSD 4.3, ISO 9899
.SH "SEE ALSO"
.BR frexp "(3), " ldexp (3)