[eluser]jedd[/eluser]
[quote author="ranjitbd" date="1251381015"]what is the difference between function and method with CI controller[/quote]
Within a controller, none.
A function is just a .. well, it's a function. The PHP.net site would describe this much better than I could, and with fewer words I suspect.
A method is what we call a function that exists within a class. (And since a controller is a class ...)
It's kind of like the distinction between an attribute and a variable ...