Redirect confusion

HI there.

I am somewhat confused as to how to move from one controller to another. It would appear that the only way to do it is to use a redirect call like this - this is inside a controller....

Code:

class Welcome extends CI_Controller {

function __construct()
{

parent::__construct();

$this->load->library('ion_auth');
}

public function index()
{

if (!$this->ion_auth->logged_in())
{
redirect('auth/login', 'refresh');
}

$this->load->view('welcome_message');
}

Is this correct? As I understand it, this switches program flow from the Welcome Controller to the login method on the Auth controller. And inside the Auth controller, I could do something like :

Code:

if (!$this->ion_auth->logged_in())
{
// redirect them to the login page
redirect('auth/login', 'refresh');
}
else
{
redirect('welcome/index', 'refresh');
}

JMB