2 pi - evaluate pi to specified accuracy
8 eps nonzero real, defaults to epsilon()
13 Returns a multiple of eps differing from the true value of pi by
14 less than 0.75 eps, and in nearly all cases by less than 0.5 eps.
17 ; print pi(1e-5), pi(1e-10), pi(1e-15), pi(1e-20)
18 3.14159 3.1415926536 3.141592653589793 3.14159265358979323846
24 NUMBER *qpi(NUMBER *eps)
29 ## Copyright (C) 1999-2006 Landon Curt Noll
31 ## Calc is open software; you can redistribute it and/or modify it under
32 ## the terms of the version 2.1 of the GNU Lesser General Public License
33 ## as published by the Free Software Foundation.
35 ## Calc is distributed in the hope that it will be useful, but WITHOUT
36 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
37 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
38 ## Public License for more details.
40 ## A copy of version 2.1 of the GNU Lesser General Public License is
41 ## distributed with calc under the filename COPYING-LGPL. You should have
42 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
43 ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
45 ## @(#) $Revision: 30.1 $
46 ## @(#) $Id: pi,v 30.1 2007/03/16 11:10:42 chongo Exp $
47 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/pi,v $
49 ## Under source code control: 1995/10/25 04:03:46
50 ## File existed as early as: 1995
52 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
53 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/