diagnol_sum.java

//import java.util.*;
/*public class diagnol_sum{
    public static void Diagnol(int arr[][]){
        int psum=0;
        int ssum=0;
        int ccase=0;
        for(int i=0;i<arr.length;i++){
            for(int j=0;j<arr[0].length;j++){

                if(i==j){
                    //primary matrix sum
                    psum=psum+arr[i][j];

                }
                if(j==arr.length-i){
                    //secondary sum of the matrix
                    ssum=ssum+arr[i][j];

                }
                if(i==j && j==arr.length-1){
                    ccase=ccase+arr[i][j];
                }
            }

        }
        System.out.println(psum+ssum-(ccase/2));n



    }

    public static void main(String[] args){
        int arr[][]={{1,2,3},{4,5,6},{7,8,9}};
        Diagnol(arr);

    }
}*/