Diagonal Sum of a Matrix
The following program illustrates Diagonal Sum of given Matrix
public class DiagonalSum {
public static void main(String[] args) {
int[][] matrix = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
System.out.println(new DiagonalSum().getDiagonalSum(matrix));
}
public int getDiagonalSum(int[][] matrix) {
int sum = 0;
for (int i = 0; i < matrix.length; i++) {
for (int j = 0; j < matrix[i].length; j++) {
if (i == j) {
sum += matrix[i][j];
}
}
}
return sum;
}
}
Result:
Ouput: 15
