Exception handling is one of the powerful mechanisms to handle the runtime errors so that the normal flow of the application can be maintained. LOLCODE does not have a lot of support for exception handling like other programming Languages. Similar to the Try-Catch block in other languages, LOLCODE has the PLZ-block.

For example, if you want to open a file that may or may not exist, use −

PLZ OPEN FILE "filename.TXT"?
   AWSUM THX
      VISIBLE FILE
   O NOES
      INVISIBLE "ERROR!"
KTHX

The code that may cause an exception is written in the PLZ block, and the exception is handled in the O NOES block. Here, the INVISIBLE keyword sends an inner message to the debugger.

Please note that as LOLCODE is not maintained regularly, there are no more updates available for LOLCODE exception handling and many other features.