fork download
copy 
  1. factorial(0,1). 
  2.  
  3. factorial(N,F) :-  
  4.    N>0, 
  5.    N1 is N-1, 
  6.    factorial(N1,F1), 
  7.    F is N * F1.
Success #stdin #stdout 0.01s 68352KB
comments (?)
stdin
copy 
?-fac(5,X)
stdout
copy 
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
uncaught exception: error(syntax_error('user_input:1 (char:3) . or operator expected after expression'),read_term/3)
https://ideone.com/g3ZsT
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!