input: Write a function to return even numbers in a list up to N.
  assert get_even_numbers(10) == [0, 2, 4, 6, 8, 10]
  assert get_even_numbers(5) == [0, 2, 4]
  assert get_even_numbers(0) == [0]
output: def get_even_numbers(N):
      return [i for i in range(N + 1) if i % 2 == 0]