input: Write a function to print a python array from the end to the beginning. If the array is empty, it should print nothing.
  assert printArrayReverse([1, 2, 3, 4, 5])==None
  assert printArrayReverse([5, 4, 3, 2, 1])==None
  assert printArrayReverse([])==None
output: def printArrayReverse(arr):
      for i in range(len(arr)-1, -1, -1):
          print(arr[i])