Case insensitive user input strings

Question

Which function to use for making user input strings case insensitive?

correctAnswer = "London"

userGuess = input("What is the capital of  Great Britain?: ")

if userGuess == "London":
    print("Correct!")
else:
    print("Wrong")

I have tried the following functions after the string:

.lower()
.capitalize()
.casefold()

The output is still 'wrong' although the answer should be correct when input is:
- london
- lOndoN
- loNDON

And so on..

Answer 1

In your string comparison, the correct answer itself had the first letter capitalized.

correctAnswer = "london"

userGuess = input("What is the capital of  Great Britain?: ").lower()

if userGuess == correctAnswer:
    print("Correct!")
else:
    print("Wrong")