.\" Copyright (c) 1991 The Regents of the University of California.
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" %sccs.include.redist.man%
.\" @(#)modf.3 5.2 (Berkeley) %G%
.Nd extract signed integral and fractional values from floating-point number
.Fn modf "double value" "double *iptr"
function breaks the argument
into integral and fractional parts, each of which has the
same sign as the argument.
It stores the integral part as a
in the object pointed to by
function returns the signed fractional part of