How to work with rectangular arrays

• Two-dimensional arrays use two indexes and allow data to be stored in a table that consists of rows and columns.
• This can also be thought of as an array of arrays where each row is a separate array of columns.
• A rectangular array is a two-dimensional array whose rows all have the same number of columns.

How to create a rectangular array

	The syntax for creating a rectangular array

		type[][] arrayName = new type[rowCount][columnCount];

	A statement that creates a 3x2 array

		int[][] numbers = new int[3][2];

How to assign values to a rectangular array

	The syntax for referring to an element of a rectangular array

		arrayName[rowIndex][columnIndex]

	The indexes for a 3x2 array

		[0][0]	[0][1]
		[1][0]	[1][1]
		[2][0]	[2][1]

	Code that assigns values to the array

		numbers[0][0] = 1;
		numbers[0][1] = 2;
		numbers[1][0] = 3;
		numbers[1][1] = 4;
		numbers[2][0] = 5;
		numbers[2][1] = 6;

	Code that creates a 3x2 array and initializes it in one statement

		int[][] numbers = { {1,2} {3,4} {5,6} };

Code that processes a rectangular array with nested for loops

int[][] numbers = { {1,2}, {3,4}, {5,6} };
for (int i = 0; i < numbers.length; i++)
{
    for (int j = 0; j < numbers[i].length; j++)
        System.out.print(numbers[i][j] + "  ");
    System.out.print("\n");
}

The console output