input: 
  def print_doubled_numbers() -> None:
      """Prints every number from 0 to 10, with each number being doubled.
  
      >>> print_doubled_numbers()
      0
      2
      4
      6
      8
      10
      12
      14
      16
      18
      20
      """
  
output:     for i in range(11):
          print(i * 2)