Exercise : printLetters

• Write a method named printLetters that takes a String as its parameter and that prints the letters of the String, separated by commas. For example, the call of printLetters("Rabbit") should print:

  R, a, b, b, i, t
  

• (Hint: This is a fencepost problem. Remember that each String object has a length method that tells you how many characters are in the String and a charAt method that gets you individual characters of the String.)
• Try solving this problem in Practice-It! using the link above.