.

It's a simple concept.
You have a process or action you want to perform but you think there will be cases where it will fail. You don't want to be caught unawares so you need to tell the compiler what to do when it encounters errors from that action you are performing.
So what you do is wrap the operation in a try-catch block. The names suggest what they do.
This is a simple explanation of how its done.

Try(
whatever process that you think might result in a failure)
Catch(
All it any of the error that you think might result from the operation above)
Throw[b][/b](
What you want to do with the error you just caught above )

Of course there are other things involved like having a finaly() and catching multiple errors/exceptions but understand the basics first.

Thnks My Oga