input: Write a python function to print every other element in a list.
  assert print_every_other([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==None
  assert print_every_other(['a', 'b', 'c', 'd', 'e'])==None
  assert print_every_other([10, 20, 30, 40, 50])==None
output: def print_every_other(lst):
      for i in range(0, len(lst), 2):
          print(lst[i])