input: from typing import List
  
  def printArrayReverse(arr: List[int]) -> None:
      """ Prints a given array from the end to the beginning.
      >>> printArrayReverse([1, 2, 3, 4, 5])
      5 4 3 2 1 
      >>> printArrayReverse([10, 20, 30])
      30 20 10 
      """
output:     for i in range(len(arr) - 1, -1, -1):
          print(arr[i], end=' ')
      print()