Represent a list or string using a variable.
AAP-1.C.1 A list is an ordered sequence of elements. For example, [value1, value2, value3, …] describes a list where value1 is the first element, value2 is the second element, value3 is the third element, and so on.
AAP-1.C.2 An element is an individual value in a list that is assigned a unique index.
AAP-1.C.3 An index is a common method for referencing the elements in a list or string using natural numbers.
AAP-1.C.4 A string is an ordered sequence of characters.