Using Arrays

Before	After
data[3] = 99 ;

Every cell of an array holds a value of the same type. So, for example, you can have an array of int, an array of double, and so on.

You can have an array of object references. This is discussed in a later chapter.

The array on the left holds data of type int. Every cell contains an int. A cell of this array can be used anywhere a variable of type int can be used. For example,

data[3] = 99 ; 

works just like an assignment to an int variable. After it has been executed, the array looks like the picture on the right.

The value in cell 3 of the array has been changed.