input: Write a function in Python that takes an array of integer values and reverses the order of the values.
  def reverse_array(arr):
    return arr[::-1]  # Returns a slice of the list in reverse order
  
  assert reverse_array([1, 2, 3, 4, 5]) == [5, 4, 3, 2, 1]
  assert reverse_array([10, 20, 30, 40]) == [40, 30, 20, 10]
  assert reverse_array([]) == []
  assert reverse_array([7]) == [7]
output: def reverse_array(arr):
    return arr[::-1]