for loop to while loop

Question

I am using a for loop to print the backwards alphabet in uppercase but I would like to know how to do the same thing with a while loop, which I am

Answer 1

Try this:

public static void main(String[] args) {
  char[] alphabet =  "abcdefghijklmnopqstuvwxyz".toCharArray();
  int index = alphabet.length - 1;

  while (index >= 0) {
    System.out.println(alphabet[index--]);
  }
}

This is a most efficient solution with minimal memory overhead.