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/** To print diagonal elements of a matrix and its Sum*/

import java.util.Scanner;

public class DiagonalElements

{

    public static void main(String [] args)

    {

        int i,j;

        final int SIZE =3;   

        Scanner input = new Scanner(System.in);

        int [][] arr = new int [SIZE][SIZE];
       
        System.out.println("Enter Array Elements");       

        for(i =0; i<3;i++ )

        {

            for(j=0;j<3;j++)

            {

                arr[i][j] = input.nextInt();

            }

        }       

         System.out.println("Entered Array");

                for(i=0;i<3;i++)

                {

                System.out.println();

                        for(j=0;j<3;j++)

                          {

                                        System.out.print(arr[i][j]+"\t");

                        }

                }

                System.out.println();


        System.out.println("Diagonal Elements");

        int sum =0;

        for(i=0;i<3;i++)

        {

        System.out.println();

            for(j=0;j<3;j++)

            {

                if(i==j||i+j==2)
               
                {

                    System.out.print(arr[i][j]+"\t");

                    sum = sum + arr[i][j];               

                }
           
                else

                    System.out.print(" \t");   
            }

        }

        System.out.println(" sum of diagonal elements =" + sum);

    }

}


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