input: def positive_feedback_loop(iterations: int) -> None:
      """
      Design a positive feedback loop for the following python program.
      The loop prints "hello" for a specified number of iterations and provides
      a positive feedback message once the last iteration is completed.
      
      >>> positive_feedback_loop(10)
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      You've got it!
      """
output:     for i in range(iterations):
          print("hello")
      print("You've got it!")