input: Write a python function to print even numbers from a list.
  assert print_even_numbers([1, 2, 3, 4, 5]) == [2, 4]
  assert print_even_numbers([10, 15, 20, 25, 30]) == [10, 20, 30]
  assert print_even_numbers([7, 8, 9, 10, 11, 12]) == [8, 10, 12]
output: def print_even_numbers(lst):
      return [num for num in lst if num % 2 == 0]