An array is a 'list' of data items which are all the same data type.

The data items in an array are called its elements. 
Each element has a subscript to identify it (usually a number...but not necessarily).

A linear list is a one-dimensional array, where each item is identified by one subscript.

Example : A linear list (one-dimensional array) of names called 'NAME' .

NAME[2] denotes the element of the array NAME which has subscript 2 - ie 'Amanda Platt'.

Processing an array usually involves a loop. The following procedure would display all the elements of the above array.