NAME
    gcd - greatest common divisor of a set of rational numbers

SYNOPSIS
    gcd(x1, x2, ...)

TYPES
    x1, x2, ... rational number

    return	rational number

DESCRIPTION
    If at least one xi is nonzero, gcd(x1, x2, ...) is the
    greatest positive number g for which each xi is a multiple of g.
    If all xi are zero, the gcd is zero.

EXAMPLE
    ; print gcd(12, -24, 30), gcd(9/10, 11/5, 4/25), gcd(0,0,0,0,0)
    6 .02 0

LIMITS
    The number of arguments may not to exceed 1024.

LINK LIBRARY
    NUMBER *qgcd(NUMBER *x1, NUMBER *x2)

SEE ALSO
    lcm

## Copyright (C) 1999-2006  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: gcd,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/bin/calc/help/RCS/gcd,v $
##
## Under source code control:	1995/10/05 04:52:26
## 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/
