input: Write a function in Python to print out an array backwards.
  def print_reverse_array(arr):
   for i in range(len(arr)-1, -1, -1): 
    print(arr[i])
    
  assert print_reverse_array([1, 2, 3, 4, 5])
  assert print_reverse_array([5, 4, 3, 2, 1])
  assert print_reverse_array(['a', 'b', 'c'])
  assert print_reverse_array([True, False, True])
  assert print_reverse_array([])
output: def print_reverse_array(arr):
   for i in range(len(arr)-1, -1, -1): 
    print(arr[i])