One state at a time

Getting the lesson ready…

One CASE does only the lines under the state’s own number, so the state changes once a scan. ELSIF sets who wins.

One state at a time: the words you will learn

looks at a number once, and does only the lines under that number

CASE … OF … END_CASE

the next question to try, only if the one before it was not TRUE

ELSIF

give the job up at once: it is over, not paused

abort