input: Write a python function to iterate through a list and print each element.
  assert print_elements([1, 5, 6, 8]) == None # Expected output: 1 5 6 8 (on separate lines)
  assert print_elements([10, 20, 30]) == None # Expected output: 10 20 30 (on separate lines)
  assert print_elements([]) == None # Expected output: (no output)
output: def print_elements(lst):
      for element in lst:
          print(element)