fork download 
  1. countdown(X) :- 0 < X.
  2. eprint(X,X):- countdown(X).
Success #stdin #stdout 0.02s 68352KB
comments (?)
stdin 
countdown(9).
stdout 
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz

yes
https://ideone.com/96pc8
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!