DO ... ENDDO

DO

   statements

ENDDO

Loop "forever".  It's the same as using DO..UNTIL FALSE.  Use IF condition THEN EXIT DO to terminate the loop.  Note;  This is a non-standard BASIC statement and should not be used if portability is an issue.

Example:

i = 1

DO

  i = i + 1

  IF i = 10 THEN EXIT DO

ENDDO