Test 1:Zeros and Stars Pattern

import java.util.Scanner;
public class Solution {

	public static void main(String[] args) {
   Scanner s=new Scanner(System.in);
        int n=s.nextInt();
		   
    int k,l;  
    for(k=1;k<=n;k++){ 
      for(l=1;l<=n;l++){
          if(k==l)  
             System.out.print("*");  
            else  
           System.out.print("0");  
      }  
      l--;  
       System.out.print("*");  
      while(l>=1){ 
          if(k==l)  
           System.out.print("*");  
          else  
           System.out.print("0");  
          l--;  
      }  
    System.out.println("");  
  }  
         }  
}