Answer to get brainiest. i need i am supposed to type a program on base conversion. starts from base of 10 (decimal) converted to any base. must use while loops, if loops, but no for loops.

Here's a solution that works except for the leading zeros. Unclear (to me) why they need to be there and what's the logic?

  public static void main(String[] args)  

  {    

       int number, base;

       Scanner Cin = new Scanner(System.in);  

       System.out.print("Enter a decimal number between 1 and 100,000: ");

       number = Cin.nextInt();

       System.out.print("Enter a base from 2-16: ");

       base = Cin.nextInt();          

       System.out.format("The number %d in base %d is %s.", number, base, Integer.toString(number, base).toUpperCase());

  }