Method main

4_2DArrays/DiagonalSum.java:23–29

(String args[])

        return sum;
    }
    public static void main(String args[]) {
        int matrix[][] = {{1, 2, 3, 4},
                        {5, 6, 7, 8},
                        {9, 10, 11, 12},
                        {13, 14, 15, 16}};
        calcSum(matrix);
    }
}