input: Write a function to reverse the order of values in an array of integers.
  
  
  def reverse_array(arr):
    return arr[::-1]  # Returns a slice of the list in reverse order
    
  # Test cases
  assert reverse_array([1, 2, 3, 4, 5]) == [5, 4, 3, 2, 1]
  assert reverse_array([10, 20, 30]) == [30, 20, 10]
  assert reverse_array([]) == []
  assert reverse_array([5]) == [5]
  
output: def reverse_array(arr):
    return arr[::-1]