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NAME
    epsilon - set or read the stored epsilon value

SYNOPSIS
    epsilon([eps])

TYPES
    eps		real number greater than 0 and less than 1

    return	real number greater than 0 and less than 1

DESCRIPTION
    Without args, epsilon() returns the current epsilon value.

    With one arg, epsilon(eps) returns the current epsilon value
    and sets the stored epsilon value to eps.

    The stored epsilon value is used as default value for eps in
    the functions appr(x, eps, rnd), sqrt(x, eps, rnd), etc.

EXAMPLE
    ; oldeps = epsilon(1e-6)
    ; print epsilon(), sqrt(2), epsilon(1e-4), sqrt(2), epsilon(oldeps)
    ; .000001 1.414214 .000001 1.4142 .0001

LIMITS
    none

LINK LIBRARY
    void setepsilon(NUMBER *eps)
    NUMBER *_epsilon_

SEE ALSO
    config

## 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: epsilon,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/epsilon,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/