Educator

Arrays

• An array is a container that holds a list of items; the size is a fixed number.

• The item can be of any user or system type.

• An array can have 1 or more dimensions, 1 dimensional arrays hold a list of values, 2 dimensional arrays are used to hold data that is in a form of a table.

• An arrays size can’t be changed once it has been declared.

• To process any array it must be processed one element at a time, by indexing the array element.

• To declare an array use the following syntax:

	data_type[] identifier= new data_type[Array size];
	int[] list = new int[100] ; or 
	String[] names= new String[100]; or 	 
	(User class) EMP[] employees= new EMP[100] ;
	int[][] accidents = new int[7][24]; // 2 dimensional array