input: Write a function to generate and print every number from 0 to 10, but with each number being multiplied by 2. The function should not return any value.
  def double_and_print():
   for i in range(11):
    print(i*2)
  assert double_and_print() is None
output: def double_and_print():
   for i in range(11):
    print(i*2)