[Chapter 9] 9.7 Exercises
Author: Randal L. Schwartz, Erik Olson & Tom Christiansen
Date: 1999-07-02T01:34:16Z

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| Chapter 9 Miscellaneous Control Structures |

## 9.7 Exercises

See Appendix A, Exercise Answers for the answers.

1. Extend the problem from the last chapter to repeat the operation until the word `end` is entered for one of the values. (Hint: use an infinite loop, and then do a `last` if either value is `end`.)

2. Rewrite the exercise from Chapter 4, Control Structures, summing numbers up to 999, using a loop that exits from the middle. (Hint: use a naked block with a `redo` at the end to get an infinite loop, and a `last` in the middle based on a condition.)

9.6 &&, ||, and ?: as Control Structures |  | 10. Filehandles and File Tests