Does all controller should have index()?

[eluser]liesbetweenyoureyes[/eluser]
I was wondering if it is a good practice to have all controllers have function index() in each or is it ok not to?

[eluser]Otemu[/eluser]
I normally have an index in all my controllers, however this isn't a requirement if your not concerned with the first segment of the URL.

The "index" function is always loaded by default if the second segment of the URI is empty.

check out the guide for more info on controllers