Code fix

[SMcNeill]

PRINT "Enter a digit"
DO
    K$ = INPUT$(1)
LOOP UNTIL K$ >= "0" AND K$ <= "6"
PRINT K$

Ooooh, INPUT$, I never noticed that one before. A pretty new bauble to play with.

INPUT$ is as old as the language itself -- nothing new or pretty about it!  Honestly though, INPUT$ should get a *LOT* more use than what it does.  What it does is:

1) Wait for a set number of keypresses.  (No need for a sleep, limit, or _delay in any loop -- it does all that itself.)
2) Return that number of keypresses back to you.

INPUT$(1) wants 1 keypress.   INPUT$(3) waits for the user to press 3 keys.  (Or one key 3 times.)

It's simple.  It's very efficient.  Why it's not used more is beyond me.