How to make this code non-case sensitive?

Question

I'm new to programming and so I'm trying out some stuff to see if I actually understood. I was able to make this "program" non-case sensitive, but really poorly (since I had to make 3 variables for the same answer, just to make it non-case sensitive). How can I make this code better?

fav_color = "Red"
fav_color2 = "RED"
fav_color3 = "red"
guess_count = 0
guess_limit = 3

while guess_count < guess_limit:
    x = input("What's Carlos' favorite color? ")
    guess_count += 1

    if x == fav_color:
        print("You win!")
        break
    if x == fav_color2:
        print("You win!")
        break
    if x == fav_color3:
        print("You win!")
        break

`'Red'` or `'RED'` in lowercase will be `'red'`. – Austin Apr 17 '19 at 13:23 — Austin, Apr 17 '19 at 13:23

score -1 · Accepted Answer · answered Apr 17 '19 at 13:19

Convert the string returned from input to lowercase with the .lower() string method.

That is to say,

fav_color = 'red'
guess_count = 0
guess_limit = 3

while guess_count < guess_limit:
    guess = input('What's Carlos' favorite color? ').lower()
    guess_count += 1
    if guess == fav_color:
        print("You win!")
        break

Just to give you a feel for how the .lower() method works, I'll provide some examples:

>>> 'Hello'.lower()
'hello'
>>> 'hello'.lower()
'hello'
>>> 'HELLO'.lower()
'hello'
>>> 'HeLLo HOW aRe YOu ToDAY?'.lower()
'hello how are you today?'

score -1 · Answer 2 · answered Apr 17 '19 at 13:19

Use str.lower() (or upper())

fav_color = "Red"

guess_count = 0
guess_limit = 3

while guess_count < guess_limit:
    x = input("What's Carlos' favorite color? ")
    guess_count += 1

    if x.lower() == fav_color.lower():
        print("You win!")
        break

How to make this code non-case sensitive?

2 Answers2