Question

In my program my P = [0,1,2] I want to store it into another LIST, because P will keep changing in a loop so I want to store P into a LIST, so my LIST will be like below :

eg.
LIST = [[0,1,2],[3,4,5],[6,7,8]]

create_list([],[]).
create_list(G, [H|G]).

This is what I did, create_list(P,LIST). I not sure how to do it as it keep return me no. But I am pretty sure I can get different P because I am able to print them out each time P changed.

Answer 1

You need to create a predicate that receives the item (list in this case) you want to append to another input list, and this would give you a new list with the which has all the items of your input list plus the new item.

So, it would be something like:

create_list(Item, List, [Item|List]).

Initially the input List would be an empty list ([]), so you might call it

create_list([0,1,2], [], List1),
create_list([3,4,5], List1, List2),
create_list([6,7,8], List2, List).

This will result in List instantiated with [[0,1,2],[3,4,5],[6,7,8]]