The suggested solution does not seem to be very DRY.

Question

My solution combines the prompting of the understanding question and validation of the correctly enter answer as the answer is not actually used for anything later on. The user can enter either 'y' or 'yes' in upper or lower case. Any other response is either considered an invalid response or the 'no' response.
The drawback to this approach is it's not possible to tell the difference between a 'no' answer which is valid and an invalid response but for something this simple, it seems a reasonable compromise as the result is much simpler.
```python
name = input("What's your name? ")
while input(f"{name}, do you understand while loops (yes/no)? ").lower() not in ('y','yes'):
    print("A while loop allows logic to be repeated until a certain condition is met.")
    print("Hope that's understandable now.")
    print("Please enter 'yes' or 'no'.")
print(f"{name}, glad to hear you understand while loops!")
```
The f-Strings feature is used instead of the .format() method as they are simpler and improve readability (for Python 3.6+).

William Burton · Answer

Here's another version that distinguishes between a valid and invalid answer. A 'quit' option was added the user doesn't want to continue:
```python
name = input("What's your name? ")
while True:
    answer = input(f"{name}, do you understand while loops (yes/no/quit)? ").lower()
    if answer in ('y','yes'):
        print(f"{name}, glad to hear you understand while loops!")
        break
    elif answer in ('n','no'):
        print("A while loop allows logic to be repeated until a certain condition is met.")
        print("Hopefully that is understandable now.")
    elif answer in ('q','quit'):
        print("Sorry to see you wish to leave. You may consider reviewing the video again.")
        break
    else:
        print("You must answer 'yes' or 'no'.")
```

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William Burton

William Burton

The suggested solution does not seem to be very DRY.

1 Answer

William Burton

William Burton