text: # This program demonstrates what happens when you
  # change the value of a parameter.
  
  def main():
      value = 99
      print('The value is', value)
      change_me(value)
      print('Back in main the value is', value)
  
  def change_me(arg):
      print('I am changing the value.')
      arg = 0
      print('Now the value is', arg)
  
  # Call the main  function.
  main()
  