Introduction to BASIC
The statements written between a DO line and a LOOP line shall be executed repeatedly.
If an EXIT-DO statement is executed, the repetition finishes and the control branches to the line following the LOOP line.
Example. A program which displays "2+4=?" and ask an input until 6 is entered.
10 DO 20 PRINT "2+4=?" 30 INPUT n 40 IF n=2+4 THEN EXIT DO 50 LOOP 60 END
Refer to DO～LOOP
Line 40 of the above program is a IF Line.
On a IF line, one statement can be written on the rihgt hand side of THEN.
A IF line has no corresponding END-IF line .
Refer to IF statement