python - While Loop doesn't recognize multiple conditions

Question

I am asking for an input from the user and it has to be a single character alphabet.

I tried this code.

ask = ''
while len(ask) != 1 and ask.isalpha() != True:
    ask = input(message).upper()

But this accepts any single number digit to break out of the while loop. I don't understand why.

I checked the ask.isalpha() on that single number and that returns False. So why does it break out of the loop.

Sorry for this question. This is very na?ve but I couldn't find an answer.

Thank you.

Edit: Added the whole code.

question from:https://stackoverflow.com/questions/65840466/while-loop-doesnt-recognize-multiple-conditions

Answer 1

You need an or operation and not and to achieve what you want. Also, you need to take user input first time before entering the while loop.

So your code should be:

ask = input(message).upper()
while len(ask) != 1 or ask.isalpha() != True:
    ask = input(message).upper()