Python: very basic help on a while loop

Question

I've searched everywhere for an answer to my question, and I still can't figure it out! The answer is probably sooooo simple but I just can't get it, maybe because I'm just getting back into Python...

Anyway, I want to create a while-loop so that until the user enters 'y' or 'n' the question will keep being asked. This is what I have:

while True:   # to loop the question
    answer = input("Do you like burgers? ").lower()
    if answer == "y" or "n":
        break

I'm honestly so baffed, so I beg for someone's help :)

`if answer in ("y", "n"):` – Steven Moseley Sep 06 '15 at 22:22 — Steven Moseley, Sep 06 '15 at 22:22

score 5 · Accepted Answer · answered Sep 06 '15 at 22:20

5

while True:   # to loop the question
    answer = input("Do you like burgers? ").lower()
    if answer == "y" or answer == "n":
        break

answered Sep 06 '15 at 22:20

StephenG

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If you wonder why this works: in Python, strings have a truth value true. A non-empty string is always true: `bool("foo") == True`, so your code will always break because of `... or "n"` which corresponds to `... or True`. – jojonas Sep 06 '15 at 22:48

Salem · Answer 2 · 2015-09-06T22:26:31.957

3

Your condition is wrong. Also if you are using Python 2.x you should use raw_input (otherwise you would need to type "y" instead of y, for example):

while True:   # to loop the question
    answer = raw_input("Do you like burgers? ").lower()
    if answer == "y" or answer == "n":
        break

edited Sep 06 '15 at 22:26

answered Sep 06 '15 at 22:23

Salem

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Python: very basic help on a while loop

2 Answers2