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NAME
    fib - Fibonacci number

SYNOPSIS
    fib(n)

TYPES
    n		integer

    return	integer

DESCRIPTION
    For any integer n, fib(n) returns the Fibonacci number with index n.
    This may be defined by fib(0) = 0, fib(1) = 1 and for any n (positive
    or negative) fib(n) = fib(n-1) + fib(n-2).

EXAMPLE
    ; print fib(-2), fib(-1), fib(0), fib(1), fib(2), fib(3), fib(4), fib(5)
    -1 1 0 1 1 2 3 5 -8

LIMITS
    none

LINK LIBRARY
    NUMBER *qfib(NUMBER *n)

SEE ALSO
    fact

## 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
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## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: fib,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/fib,v $
##
## Under source code control:	1995/10/25 04:03:45
## 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/