资料来源 : Free On-Line Dictionary of Computing

repeat loop
     
         (Or "do loop") A {loop} construct found in many
        {imperative} programming languages which repeatedly executes
        some instructions while a condition is true.
     
        It is found in {Pascal}, {BASIC} and {C} ("do" form). The
        condition may be tested with a "while" or "until" {keyword}.
     
        In constrast to a {while} loop, the "loop body" is executed
        once before the condition is tested.  This is useful when the
        condition depends on the action of the loop body.  In the
        following BASIC loop "Hello" is printed once despite the fact
        that the condition is false;
     
         i = 2
         repeat
           print "Hello"
           i = i+1
         until i>0
     
        See also {while loop} and {for loop}.
     
        (1999-05-06)