How to use 2D array?

2D ARRAY

How to declare an integer array of size 5?

        int ar1[]=new int[5];                        // declaration of 1D array

How to declare an integer array of size 5 and initialize the same?

        int ar2[]={5,6,7,8,8};                      // declaration & initialization of 1D array

How to print the elements of an integer array?

        int ar2[]={5,6,7,8,8};                      // declaration & initialization of 1D array
        for(int i=0;i<ar1.length;i++)             // loop for accessing all elements of the array
        {
            System.out.println(ar1[i]+" ");     // printing the elements of the array
        }

How to initialize a 2D array at the time of declaration?

        int ar3[][]={                                  // declaration and initialization of 2D array
                {5,6,7,9,8},
                {5,8,8},
                {4,3,2,8}
            };

How to access the elements of a 2D array?

        for(int i=0;i<ar3.length;i++)             // outer loop is for accessing rows
        {
            for(int j=0;j<ar3[i].length;j++)      // inner loop is for accessing columns
            {
                System.out.print(ar3[i][j]+" ");  // printing the elements in tabular form
            }
            System.out.print("\n");                 // changing the line after one row
        }