(* Copyright (C) 2009 Free Software Foundation, Inc. *)
(* This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GNU Modula-2 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 General Public License
for more details.

You should have received a copy of the GNU General Public License along
with gm2; see the file COPYING.  If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)

MODULE fact ;

FROM libc IMPORT printf ;

PROCEDURE factorial (n: CARDINAL) : CARDINAL ;
BEGIN
   IF n>1
   THEN
      RETURN n*factorial(n-1)
   ELSE
      RETURN 1
   END
END factorial ;


VAR
   i: CARDINAL ;
BEGIN
   i := factorial(7) ;
   printf("factorial of 7 is %d\n", i)
END fact.