Control-Flow Functions and Statements


 Looping
 -------
 FOR...NEXT
 Repeats statements between FOR and NEXT a specific number of times.

 EXIT FOR
 Provides an alternative way to exit a FOR...NEXT loop.

 DO...LOOP
 Repeats statements between DO and LOOP, either until a given condition is
 true (DO...LOOP UNTIL condition), or while a given condition is true
 (DO...LOOP WHILE condition).

 EXIT DO
 Provides an alternative way to exit a DO...LOOP loop.

 WHILE...WEND
 Repeats statements between WHILE and WEND while a given condition is true
 (similar to DO WHILE condition...LOOP).


 Making decisions
 ----------------
 IF...THEN...ELSE
 END IF
 Conditionally executes or branches to different statements.

 SELECT CASE
 END SELECT
 Conditionally executes different statements.


 Managing the stack
 ------------------
 STACK Function
 Returns maximum stack size that can be allocated.

 STACK Statement
 Sets stack to new size.


 Exiting the program
 -------------------
 END number
 SYSTEM number
 STOP number
 Exit the program and set error level defined by number. If number is not
 present, exit the program with error level set to 0.