input: Write a function to create a python program that prints "Hello World!" five times. If the input is invalid or not needed, the function should simply perform the task.
  assert print_hello_world(None)
  for x in range(5):
      print("Hello World!")
  assert print_hello_world([1, 2, 3])
  for x in range(5):
      print("Hello World!")
  assert print_hello_world("random string")
  for x in range(5):
      print("Hello World!")
output: def print_hello_world(input):
      for x in range(5):
          print("Hello World!")