RosettaCodeData/Task/Function-definition/Prolog/function-definition-4.pro

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Prolog
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2013-10-27 22:24:23 +00:00
:- use_module(library(function_expansion)).
user:function_expansion(multiply(A, B), P, P is A * B). % "function" definition
go :-
format("The product is ~d.~n", [multiply(5, 2)]).