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 Repeats a block of statements while or until a condition is true.
 
 Syntax 1: Condition evaluated; if True, statementblock executed, and so on
           (WHILE); if False, statementblock executed until True (UNTIL).
    DO [{WHILE | UNTIL} condition]
         [statementblock]
         [EXIT DO]
         [statementblock]
    LOOP
 
 Syntax 2: Statementblock executed, then condition evaluated; if True,
           statementblock re-executed, and so on (guaranteed one-time
           execution of statements).
    DO
         [statementblock]
         [EXIT DO]
         [statementblock]
    LOOP[{WHILE | UNTIL} condition]
 
    ■ condition         Numeric expression that evaluates as True (nonzero)
                        or False (zero)
 
    ■ statementblock    One or more valid statements on one or more lines
 
    ■ EXIT DO           Alternative exit from DO...LOOP; transfers control
                        to the statement following the LOOP keyword
 
 See Also
    ◄FOR...NEXT Statement►             ◄Loops and Decision Structures►
    ◄WHILE...WEND Statement►