input: Write a function to iterate over a list of numbers and print only the even numbers.
  
  assert even_numbers_printer([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
  assert even_numbers_printer([2, 4, 6, 8, 10])
  assert even_numbers_printer([1, 3, 5, 7, 9])
  assert even_numbers_printer([])
  
  This function should check each number in the list and print it if it is even. If the list is empty, it should print nothing.
output: def even_numbers_printer(numbers):
      for num in numbers:
          if num % 2 == 0:
              print(num)