input: Write a function to print "Hello World!" five times.
  
  assert print_hello_world_five_times()==None
  
  Expected output:
  """
  Hello World!
  Hello World!
  Hello World!
  Hello World!
  Hello World!
  """
output: def print_hello_world_five_times():
      for _ in range(5):
          print("Hello World!")