input: Write a function to print "Hello World!" five times. The function should not take any arguments and should only perform the specified printing task.
  assert custom_output()==None
  assert custom_output()==None
  assert custom_output()==None
  assert custom_output()==None
  assert custom_output()==None
output: def custom_output():
      for _ in range(5):
          print("Hello World!")