input: Write a function to print out every number from 0 to 10, but with every number being multiplied by 2.
  
  assert double_print()==None
  assert double_print()==None
  assert double_print()==None
  assert double_print()==None
  assert double_print()==None
output: def double_print():
      for i in range(11):
          print(i * 2)