I tried to understand the difference between -n and -p in perl.

Both has while loop surrounded, which reads the input line by line using diamond operator, and has the code executed for each line ( program inside that loop ). And the only difference is -n suppresses printing, and -p prints $_ by default.

But i got confused from this explanation in the man page, man perlrun which says,

   LINE:
                while (<>) {
                    ...             # your program goes here
                } continue {
                    print or die "-p destination: $!\n";
                }
[download]

I've never used continue like the above, and not able to understand what the above means ? Please explain what does the above code means, and is there any other difference between -n and -p.