Track 4 · Lesson 6 of 11

Input loops and sentinel values

Keep reading input until the user types a stop word, and re-ask for input until it is valid.

You will be able to

• Read input repeatedly until a sentinel value such as done appears
• Use the read-before-the-loop, read-again-at-the-end pattern
• Write a validation loop that keeps asking until the input is acceptable
• Combine two conditions to limit the number of attempts