Sum Of 2-D Array

Sum Of 2-D Array


Write a program to print the sum of all the elements of a 3x3 matrix.

import java.io.*;

class Sum
{
public static void main(String ar[])throws Exception

    {
        BufferedReader ob=new BufferedReader(
        new InputStreamReader(System.in));
        int i,j,sum=0;

        int a[][]=new int[3][3];

        System.out.println("Enter "+(3*3)+" elements ");

        for(i=0;i< 3;i++)
        {
            for(j=0;j< 3;j++)
            {
                a[i][j]=Integer.parseInt(ob.readLine());
            }
        }

        for(i=0;i< 3;i++)
        {
            for(j=0;j< 3;j++)
            {
                sum=sum+a[i][j];
            }
        }
        System.out.println("\nSum = "+ sum);
    }
}

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