public static void main(String[] args) {

System.out.println("Welcome to Sum of Diagonal Array Sum Method");

int[][] myArray = input2DArray();

int resultSum = DiagonalSum(myArray);

System.out.println("Diagonal Sum = " + resultSum);

}

public static int[][] input2DArray(){

Scanner input = new Scanner(System.in);

System.out.println("Enter No of Row: ");

int rows = input.nextInt();

System.out.println("Enter No of Column: ");

int columns = input.nextInt();

int[][] MyDiagonalArray = new int[rows][columns];

int row = 0;

while (row < rows) {

int column = 0;

while (column < columns) {

System.out.print("Enter Row" + (row + 1) + " " + "Column " + (column+1) + ":");

MyDiagonalArray[row][column] = input.nextInt();

column++;

}

row++;

}

return MyDiagonalArray;

}

public static int DiagonalSum(int[][] myArray){

int LeftDiagonalSum = 0;

int RightDiagonalsum = 0;

int row = 0;

int column = 0;

int arrayLength = myArray.length;

if (arrayLength != myArray[0].length) {

System.out.println("Diagonal Sum Not Possible");

return 0;

}

while (row < arrayLength) {

LeftDiagonalSum += myArray[row][column];

RightDiagonalsum += myArray[row][(arrayLength -1)-column];

row++;

column++;

}

int totalSum = LeftDiagonalSum + RightDiagonalsum;

if (arrayLength % 2 != 0) {

int centerValue = arrayLength / 2;

totalSum -= myArray[centerValue][centerValue];

}

return totalSum;

}

}