Oops, try again. double_list([0, 1]) returned None. Did you remember to return the result?
<What do you expect to happen instead?
i dont understand whats wrong
Replace this line with your code. n = [3, 5, 7] def double_list(x): for i in range(0, len(x)): x[i] = x[i] * 2 # Don't forget to return your new list! print double_list(n)