DO ... WHILE

  The do...while statement is similar to the while statement and has
  the form:

       do
         <statement>
       while (<expression>);

  <statement> will be executed at least once and will continue to be
  executed repeatedly until the expression becomes 0 (FALSE). A few
  examples are:

       do
         stat = func1();
       while (stat != -1);

       do
        {
         prints("hello");
         num = num + 1;
        }
       while (num < 100);