9 lines
490 B
Prolog
9 lines
490 B
Prolog
% call the helper predicate with the list to be reversed and an empty Accumulator to build up
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reverseList(List, Reversed) :- reverseListHelper(List, [], Reversed).
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% base case fact: when the list to reverse is empty, the accumulator is the reversed list
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reverseListHelper([], Accumulator, Accumulator).
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% recurse with the tail after prepending the head to the accumulator
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reverseListHelper([Head | Tail], Accumulator, Reversed) :- reverseListHelper(Tail, [Head | Accumulator], Reversed).
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