input: Write a function to print even numbers from a list.
  assert print_evennumbers([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==None
  assert print_evennumbers([10, 20, 45, 67, 84, 93])==None
  assert print_evennumbers([5, 7, 9, 8, 6, 4, 3])==None
output: def print_evennumbers(lst):
      even_numbers = [num for num in lst if num % 2 == 0]
      for num in even_numbers:
          print(num)