before picking up apple table = {apple0, apple1, apple2, apple3}; //length == 4 hand = {}; //length == 0 after table = {apple0, apple1, apple2};

before picking up apple table = {apple0, apple1, apple2, apple3}; //length == 4 hand = {}; //length == 0 after table = {apple0, apple1, apple2}; length == 3 hand = {apple3}; //length == 1 You count apples in hand by looking at how many items there are, not by what indexes they have.