Exception handling allows you to design and code the normal case for your program separately from the code that handles exceptional situations.
An exception can be thrown in a try block. Alternatively, an exception can be thrown in a function definition that does not include a try block (or does not include a catch block to catch that type of exception). In this case, an invocation of the function can be placed in a try block.
An exception is caught in a catch block.
A try block may be followed by more than one catch block. In this case, always list the catch block for a more specific exception class before the catch block for a more general exception class.
Do not overuse exceptions.