  REPEAT

   REPEAT
       <body>
       [BREAK]
   UNTIL <expr>

   Type: statement

   The REPEAT/UNTIL construction repeats a body of statements. The
   difference with WHILE/WEND is that the body will be executed at least
   once. The optional BREAK statement can be used to break out the loop.
   Example:

   REPEAT
       C = GETKEY
   UNTIL C EQ 27

