Problem Statement

Show the syntax for a complete stoppage of a program inside a   conditional. This includes all threads/processes which are part of your program. Explain the cleanup (or lack thereof) caused by the termination (allocated memory, database connections, open files, object finalizers/destructors, run-on-exit hooks, etc.).
Unless otherwise described, no special cleanup outside that provided by the operating system is provided.

Let's start with the solution:

$$ MODE TUSCRIPT
IF (condition==1) STOP
-> execution stops and message:
IF (condition==2) ERROR/STOP "condition ",condition, " Execution STOP "