Diagonal sum
public class diagonalsum {
public static void diagonal(int n[][]) {
int sum = 0;
for (int i = 0; i < n.length; i++) {
for (int j = 0; j < n.length; j++) {
if (i == j) {
sum += n[i][j];
;
} else if (i + j == n.length - 1) {
sum += n[i][j];
}
}
}
System.out.println(sum);
}
public static void main(String[] args) {
int n[][] = { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 }, { 13, 14, 15, 16 } };
diagonal(n);
}
}
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