How do you add two lists in Prolog?

append([X|Y],Z,[X|W]) :- append(Y,Z,W). append([],X,X). So it gets the Z by removing the elements of [X|Y] in [X|W] .

How do I append in Prolog?

Introduction to Prolog append

append([], Y, Y). – append [], Y to get Y.
append ([X|L1],L2,[X|L3]). – append[X|L1] and Y to get [X|L3]
append(L1,L2,L3). – If append X and Y to get Z.

How do you append 3 in Prolog?

One important use of append/3 is to split up a list into two consecutive lists. For example:?- append(X,Y,[a,b,c,d]). That is, we give the list we want to split up (here [a,b,c,d] ) to append/3 as the third argument, and we use variables for the first two arguments.

How do I make a list on SWI Prolog?

If you want to create a list of consecutive numbers from 1 to N you can use builtin predicates findall/3 and between/3 this way: do_list(N, L):- findall(Num, between(1, N, Num), L).?- do_list(5,L). L = [1, 2, 3, 4, 5].

How do I make a list in Prolog?

In Prolog list elements are enclosed by brackets and separated by commas. Another way to represent a list is to use the head/tail notation [H|T]. Here the head of the list, H, is separated from the tail of the list, T, by a vertical bar. The tail of a list is the original list with its first element removed.

How do I add an item to the end of a list in Prolog?

% add_tail(+List,+Element,-List) % Add the given element to the end of the list, without using the “append” predicate. add_tail([],X,[X]).

How do I create a list in Prolog?

What does \+ mean in Prolog?

Because of the problems of negation-as-failure, negation in Prolog is represented in modern Prolog interpreters using the symbol \+ , which is supposed to be a mnemonic for not provable with the \ standing for not and the + for provable.

How do you create an empty list in Prolog?

In Prolog we represent the empty list by the atom [] and a non-empty list by a term [H|T] where H denotes the head and T denotes the tail. 1.01 (*) Find the last element of a list. Example:?- my_last(X,[a,b,c,d]).