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X is 1 :- C rem 2 =/= 0.
X is 0 :- C rem 2 =:= 0.
write('even') :- X is 1.
write('odd'):- X is 0.

Compilation error #stdin compilation error #stdout 0s 0KB

stdin

?- C is 5.

compilation info

prog.pl:1:19: syntax error: . or operator expected after expression
prog.pl:2: fatal error: redefining built-in predicate (is)/2
compilation failed

stdout

Standard output is empty

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language:

Prolog (gprolog 1.4.5)

created:

visibility:

public

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