Creating a list:

See if the element is also in list b. If so, add it to the new list. If not, do nothing. list_diff(a, b)Returns a new list that is all of the elements in a that are not in b. Does not modify a or b. Nothing is printed. Create a new empty list. Step through list a one element at a time. See if the element is also in list b. If so, do nothing. ................
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