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  1. countdown(X).	
  2. write(X).
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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countdown(9).
compilation info 
prog.pl:1: warning: singleton variables [X] for countdown/1
prog.pl:2: fatal error: redefining built-in predicate write/1
compilation failed
stdout
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Standard output is empty
https://ideone.com/1GvgB
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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