1 UNTIL
 The UNTIL statement marks the beginning of an UNTIL  loop  or  qualifies
 the execution of another statement.

 Examples

 UNTIL Z% = 100%
      .
      .
      .
 NEXT

 100    A% = A% + 1% UNTIL A% = 200%

2 Syntax

 Conditional:

     UNTIL cond-exp
           [ statement ]...
     NEXT

 Statement Modifier:

     statement UNTIL cond-exp