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NAME
    frac - return the fractional part of a number or of numbers in a value

SYNOPSIS
    frac(x)

TYPES
    If x is an object of type xx, frac(x) requires xx_frac to have been
    defined; other conditions on x and the value returned depend on
    the definition of xx_frac.

    For other x:

    x		number (real or complex), matrix

    return	number or matrix

DESCRIPTION
    If x is an integer, frac(x) returns zero.  For other real values of x,
    frac(x) returns the real number f for which x = i + f, where i is an
    integer, sgn(f) = sgn(x), and abs(f) < 1.

    If x is complex, frac(x) returns frac(re(x)) + frac(im(x))*1i.

    If x is a matrix, frac(x) returns the matrix m with the same structure
    as x in which m[[i]] = frac(x[[i]]).

EXAMPLE
    ; c = config("mode", "frac")
    ; print frac(3), frac(22/7), frac(27/7), frac(-3.125), frac(2.15 - 3.25i)
    0 1/7 6/7 -1/8 3/20-1i/4

LIMITS
    none

LINK LIBRARY
    NUMBER *qfrac(NUMBER *x)
    COMPLEX *c_frac(COMPLEX *x)
    MATRIX *matfrac(MATRIX *x)

SEE ALSO
    int, ceil, floor

## Copyright (C) 1999  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: frac,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/frac,v $
##
## Under source code control:	1995/12/18 03:30:59
## File existed as early as:	1995
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/