END [<value>]
Terminates execution and returns to the Operating System (i.e. to the Sinclair BASIC interpreter). An optional value can be used (defaults to 0 if not specified) that will be returned to the OS.
PRINT "HELLO WORLD"
END 32: REM The value 32 will be returned to the OS
END
is also a keyword used to close scopes in FUNCTION and SUB
and compound sentences in IF, WHILE.