input: Write a python function to print even numbers in a given range.
  assert print_even_numbers(1, 10)==[2, 4, 6, 8, 10]
  assert print_even_numbers(15, 25)==[16, 18, 20, 22, 24]
  assert print_even_numbers(30, 40)==[30, 32, 34, 36, 38, 40]
output: def print_even_numbers(start, end):
      return [num for num in range(start, end + 1) if num % 2 == 0]