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  1. even(0).
  2. even(X) :- mod(X,2) is 0.
Success #stdin #stdout 0.02s 68352KB
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mod(2,2).
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GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
uncaught exception: error(existence_error(procedure,(mod)/2),top_level/0)
https://ideone.com/xAiJK
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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