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  1. countdown(X,Y) :- X is Y.
  2. write(X).
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Y=10.
compilation info 
prog.pl:2: fatal error: redefining built-in predicate write/1
compilation failed
stdout 
Standard output is empty
https://ideone.com/SSfd3
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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