input: 
  def reverse_array(arr):
      """ Reverses the order of values in an array of integers.
      >>> reverse_array([1, 2, 3, 4, 5])
      [5, 4, 3, 2, 1]
      >>> reverse_array([10, -2, 33, 44, 55])
      [55, 44, 33, -2, 10]
      """
      return arr[::-1]  # Returns a slice of the list in reverse order
  
output:     return arr[::-1]  # Returns a slice of the list in reverse order