An array is a collection of data storage locations, each of which holds the same type of data. Each storage location is called an element of the array.

You declare an array by writing the type, followed by the array name and the subscript. The subscript is the number of elements in the array, surrounded by square brackets. For example,

declares an array of 25 long integers, named LongArray. When the compiler sees this declaration, it sets aside enough memory to hold all 25 elements. Because each long integer requires 4 bytes, this declaration sets aside 100 contiguous bytes of memory, as illustrated in Figure 11.1.

Figure 11.1. Declaring an array.