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Double Dimensional Array - Diagonal Sum - Java Programs

Question 9
Write a program to input and store integer elements in a double dimensional array of size 3 × 3 and find the sum of elements in the left diagonal.

Example:
1 3 5
4 6 8
9 2 4

Output:
Sum of the left diagonal elements = (1 + 6 + 4) = 11

Java


import java.util.Scanner;
class Matrix{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int a[][] = new int[3][3];
        int sum = 0;
        System.out.println("Enter elements:");
        for(int i = 0; i < a.length; i++){
            for(int j = 0; j < a.length; j++){
                a[i][j] = Integer.parseInt(in.nextLine());
                if(i == j)
                    sum += a[i][j];
            }
        }
        System.out.println("Sum of the left diagonal elements = " + sum);
    }
}

Output

 
 OUTPUT 1: 
Enter elements:
1
2
3
4
5
6
7
8
9
Sum of the left diagonal elements = 15 

 OUTPUT 2: 
Enter elements:
5
1
9
2
8
3
4
7
6
Sum of the left diagonal elements = 19