Language basics / Flow control |
The WHILE statement executes a block of statements until the specified condition becomes false.
WHILE condition { statement | EXIT WHILE | CONTINUE WHILE } [...] END WHILE
As long as the condition specified after a WHILE keyword is TRUE, all statements inside the WHILE ... END WHILE block are executed. After executing the last statement of the block, the runtime system again evaluates the condition, and if it is still TRUE, continues with the first statement in the block.
The loop stops when the condition becomes FALSE or when an EXIT WHILE is reached.
Use the CONTINUE WHILE instruction to skip the next statements and continue with the loop.
To avoid unending loops, make sure that the condition will become FALSE at some point, or that an EXIT WHILE statement will be executed.
MAIN DEFINE cnt INTEGER LET cnt = 1 WHILE cnt <= 100 DISPLAY "Iter: " || cnt LET cnt = cnt + 1 IF int_flag THEN EXIT WHILE END IF END WHILE END MAIN