Question

. Given a number N, create a 2D arrays with n rows and n columns. Now inspect the matrix pattern below and come up with a formula to populate the array for any give NXN matrix.

Answer 1

public class Main {
    public static void main(String[] args) {
        int n = 5;
        int[][] array = new int[n][n];
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length - i; j++) {
                array[i][j] = 1;
            }
        }
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length; j++) {
                System.out.print(array[i][j]+" ");
            }
            System.out.println();
        }
    }
}