The final version of the for command given in Section 2.6 has the defect that the value of the control value, after the last execution of the subcommand, is set to the next integer beyond the interval...

The final version of the for command given in Section 2.6 has the defect that the value of the control value, after the last execution of the subcommand, is set to the next integer beyond the interval of iteration, which can cause unnecessary overflow. Define a for command (as syntactic sugar) that will never set the control variable to any integer outside the interval of iteration.