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  1. even(X):-X mod 2 =:= 0.
Success #stdin #stdout 0.02s 68352KB
comments (?)
stdin 
even(122).
stdout 
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz

yes
https://ideone.com/eqAjr
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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