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  1. ?- write('Hello world!'), nl.
  2. Hello world!
  3. true.
  4.  
  5. ?-
Success #stdin #stdout 0.02s 6204KB
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Standard input is empty
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Hello world!
https://ideone.com/Pcafx
language:
Prolog (swi 7.6.4)
created:
14 years ago
visibility:
public

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