what exactly is a controller?

[libsfan01]

hi im new to ROR and although i know how to work with controllers I'm
having difficulty understanding what exactly they are and why they are
used? please help enlighten me

 

[David Chelimsky]

Googling "model view controller" will provide myriad answers.

 

[manohar amrutkar]

Controllers receive events from the outside world (i/p) , interact
with d model , & dispaly an appropriate view to user .

ie. transfers job to appropriate action.