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  1. countdown(X) :- X>0,
  2. X is X-1,
  3. countdown(X).
Success #stdin #stdout 0.01s 68352KB
comments (?)
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?- countdown(9)
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GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
uncaught exception: error(syntax_error('user_input:1 (char:4) . or operator expected after expression'),read_term/3)
https://ideone.com/7JM4a
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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