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  1. countdown(0) :-
  2. write(0), nl,
  3. !.
  4. countdown(X) :-
  5. X > 0, 
  6. write(X), nl,
  7. Y is X-1,
  8. countdown(Y).
Success #stdin #stdout 0.01s 68352KB
comments (?)
stdin
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countdown(15).
stdout
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GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0

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

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