Help for the simple terminal in phyton

Question

Hello
I want to create a simple terminal to ask the user "Are you ready?"

1- If user entered "Y" then terminal show the question

2- If user entered "N" then terminal finish

3 - If user entered any other word terminal show "Please enter Y or N" and ask the question again.

I write it like below but it always says the "Please enter Y or N"

print("So, Are you ready for the game?")
print("Y=Yes N=No")

answer = input()

while answer != "Y" or answer != "N":
print("Please enter Y or N")
answer = input()

if answer == "Y":
print("Great! Lets start")

if answer == "N":
print("Come back when you were ready")

Answer 1

Mohammad Razavi ,

> the issue is the current logical expression, so lets fix this.

here you can see how the evaluation of the expression is:

if input => Y
answer = 'Y', answer != "Y" = False, answer != "N" = True, answer != "Y" or answer != "N" = True

if input => N
answer = 'N', answer != "Y" = True, answer != "N" = False, answer != "Y" or answer != "N" = True

if input = X
answer = 'X', answer != "Y" = True, answer != "N" = True, answer != "Y" or answer != "N" = True

since we are using a logical *or*, the result of the expression will be True if one of the parts is True.
> so what ever character we input, the complete expression will be true (which is while True: => infinite loop)

> to fix it we can use this:
while answer not in 'YN':
...
or this:
while not (answer == 'Y' or answer == 'N'):
...
https://code.sololearn.com/cAhdevvav4pF/?ref=app

Answer 2

I would put if statements inside the loop

Answer 3

The user must capitalize his or her answer before the code can validate it

Answer 4

Lothar

Thank you very much!
Your answer helped me a lot! 🙏👍

Answer 5

Here is a working example of my suggestion:

https://code.sololearn.com/c5DzR3BlJHT8/?ref=app

Answer 6

Aweneg Rooney

Even the user entered the capitalized word it says "please enter Y or N"

Answer 7

You could add answer=answer.upper() after your input() statement.

Answer 8

Keith Driscoll
When i change the answer = input() to answer = input().upper it dosen't work and show the "Please enter Y or N" again

Answer 9

Lamron

Thanks! It worked but still have problem.
When i put the if statements inside the while loop user have to press Y or N twice.
First time terminal shows "Please enter Y or N" but at second try it works well.

Answer 10

Keith Driscoll
Thanks for your kindness sir ! 🙏

Answer 11

It is best you use a loop for this so that your code does not look too messy and you are able to call back later

while True :
response1 = input("Y=Yes N=No : ")
if response1 == "Y" :
print("Great! Lets start")
elif response1 == "N" :
print("Come back when you were ready")
break
else :
print("Please enter a valid input :(")

So this loops keeps asking tho😂😂

Answer 12

Hello bro

Answer 13

https://code.sololearn.com/cF3m8sVK2jEm/?ref=app

Answer 14

Olasehinde Michael
Thank you for your code.
It Helped me a lot! 🙏

Answer 15

Hi can we be friends 🙂 ☺️ 😊 pls Idond have any friend 🥺🥺🥺

Answer 16

Eaz Mahodi Sagor
Thank you sir
Your code Helped me a lot! 🙏

Answer 17

while True:
command = input("Enter a command: ")

if command == "exit":
print("Exiting the terminal.")
break

print(f"You entered: {command}")