What is the function of the Try-Catch-Finally block?

The try block encloses those statements that can cause exception and the catch block handles the exception, if it occurs. Catch block contains the statements that have to be executed, when an exception occurs. The finally block always executes, irrespective of the fact whether or not an exception has occurred. The finally block is generally used to perform the cleanup process. If any exception occurs in the try block, the program control directly transfers to its corresponding catch block and later to the finally block. If no exception occurs inside the try block, then the program control transfers directly to the finally block.

Example:-

 try
{
 // statements that can cause exception

     return 1;

  }

  catch(exception)

 {
// statement that handles the exception

  return 2;

  }

  finally

 {
 // statement that  always executes

  return 3;

  }