Look at that. How nice is that? Moving away from line numbers in the 80's while maintaining compatibility.
Applesoft BASIC with Line Numbers
10 HOME: M$ = "MESSAGE"
20 FOR X = 1 TO 20
30 GOSUB 200
40 NEXT X
...
210 HTAB 20 - LEN(M$)/2
210 PRINT M$
220 RETURN
Applesoft BASIC without Line Numbers
HOME: M$ = "MESSAGE"
FDR X = 1 TO 20
GOSUB CENTER
NEXT X
...
CENTER
HTAB 20 - LEN(M$)/2
PRINTM$
RETURN