• Your computer’s memory is like a giant set of drawers.
• When you want to store multiple elements, use an array or a list.
• With an array, all your elements are stored right next to each other.
• With a list, elements are strewn all over, and one element stores
the address of the next one.
• Arrays allow fast reads.
• Linked lists allow fast inserts and deletes.
• All elements in the array should be the same type (all ints,
all doubles, and so on).