Array Definitions
lArray  A collection of homogenous elements, given a single name 
lLength  A variable associated with the array that contains the number of locations allocated to the array
lSubscript (or index)  A variable or constant used to access a position in the array:  The first array element always has subscript 0, the second has subscript 1, and the last has subscript length-1
lWhen allocated, the elements are automatically initialized to the default value of the data type: 0 for primitive numeric types, false for boolean types, or null for  references types.