CODEWITHSUNDEEP
listprolog
Pedro Romano Barbosa
Pedro Romano Barbosa

Reputation: 647

Increment list items by a certain value in prolog

I'm trying to write a predicate that increments a list item by a certain value. I wrote this one but it's not giving me the correct result:

%--Increments every single list item by a certain Value.
incList([],[],_).
incList([X | List], [X2 | List2],Value) :-
    incList(List,List2),
    X2 is X + Value.

It only increments the first one. Any solutions on how to solve this without changing the structure of the predicate? Thank you.

Upvotes: 0

Views: 1828

Answers (1)

Pedro Romano Barbosa
Pedro Romano Barbosa

Reputation: 647

As joel76 mentioned I have a typo on line2 of second predicate. It should be incList(List,List2,Value) not incList(List,List2).

Upvotes: 1

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