Block terminator or a break.

Closes hai block only. Cannot be used as a break or to close any other block.

Every program must contain a hai block at the beginning of the program and must contain a KTHXBYE block at the end.

At any point in the program you may place KTHXBYE blocks in order to terminate the program early. These are best placed in iz statements.

IZ VAR BIGGER THAN 10? KTHXBYE

This code checks whether the variable is bigger than 10, if it is then the program terminates using the KTHXBYE block.

See also: kthx