Answer to Question #256331 in Java | JSP | JSF for Dolly

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.

5      4      3    2   1

10    8      6    4   2

15   12     9    6   3

20   16    12   8   4

25    20   15  10  5

Sample Run1                                               

         Enter a number (N): 5                                                                         

Output1:

5      4      3    2   1

10    8      6    4   2

15   12     9    6   3

20   16    12   8   4

25    20   15  10  5

Answer 1

Source code

import java.util.Scanner;
public class Main
{
	public static void main(String[] args) {
	    Scanner in=new Scanner(System.in);
	    System.out.print("Enter a number (N): ");
	    int n=in.nextInt();
		int x=1;
		for(int i=n;i>=1;i--){
		    for(int j=n;j>=1;j--){
		        System.out.print((j*x)+"\t");
		    }
		    System.out.println();
		    x++;
		}
	}
}

Output