parameters in url without controller and action route

I have recently started working on codeigniter 3 and new to codeigniter.

I am familiar with PHP framework and MVC and have already builded many applications in CakePHP framework.

I have started working on a project in Codeigniter whereI want url containing username like


which will map to 'Profile' controller and 'view' action with username as parameter
Is it possible? If yes, how?