HW5.18

 public class Solution
 {
     public static void main(String[] args)
     {
         System.out.printf("%s\t%s\n", "Number", "Sqrt");
 
         for(int i = 0; i <= 20; i++)
             System.out.printf("%d\t%f\n", i, Math.sqrt(i));
     }
 }