Guys I got a question,

When you use the Ambersand sign "&" infront of a variable it means we are passing the address of that variable , right?

what happents when you have the "&" at the end of the variable .
Ex :
if I have a function header

exam(const K&, const V&);

what is the usgae of & in the above?

and what is the difference between this one
exam(const &K, const &V);