Python Loop - Continue Asking Until Correct Answer Is Inputted

I am doing a fitness program in Python and I need to collect information about the user. The rest of the code works fine except when collecting gender. I want the code to repeat th

Solution 1:

This is the right approach:

while gender not in("M","F","m","f"):

when you check or "m", "m" is True as it has value in the string and therefore it will always be true.

You also could do :

while gender != "M" or gender != "F" or gender != "m" or gender != "f":