Array : Sum Of Diagonals

import java.io.*;
public class Diaoganols_sum
{
public static void main(String[] args)throws IOException
{
int n;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the size of 2 dimensional Array:-");
n =Integer.parseInt(br.readLine());
int[][] arr = new int[n][n];
int i,j,d1=0, d2=0;
System.out.println("Enter the Elements");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
arr[i][j] = Integer.parseInt(br.readLine());
}
}
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if(i==j)
d1 = d1+ arr[i][j];
if(i+j==n-1)
d2 = d2 + arr[i][j];
}
}
System.out.println("Sum Of Diagonals : " + (d1+d2));
}
}

/*

Example :

Enter the size of 2 dimensional Array:-

INPUT:

2

Enter the Elements

1

2

3

4

OUTPUT:

Sum Of Diagonals : 10

*/