Python: Input verification for checking if a number is in a list

Question

This just loops infinitely. Even if I enter something like 10. I'm still a Python noob, sorry for the dumb question.

number_list = [10, 20, 30, 40]    
number = input("Enter a number: ")
while number not in number_list:
    number = input("Not a valid number, try again: ")
print(number)

input returns a string you need to convert it to an int. – It_is_Chris Dec 08 '21 at 21:38 — It_is_Chris, Dec 08 '21 at 21:38
^^ read this answer again, it contains the secret answer – AbbeGijly Dec 08 '21 at 21:39 — AbbeGijly, Dec 08 '21 at 21:39

score 1 · Accepted Answer · edited Dec 08 '21 at 21:39

1

input returns a str, and you're comparing it to a list of ints. Change it to:

number_list = [10, 20, 30, 40]    
number = int(input("Enter a number: "))
while number not in number_list:
    number = int(input("Not a valid number, try again: "))
print(number)

edited Dec 08 '21 at 21:39

azro

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answered Dec 08 '21 at 21:38

Samwise

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you forgot `number = int(input("Not a valid number, try again: "))` – It_is_Chris Dec 08 '21 at 21:39

Python: Input verification for checking if a number is in a list

1 Answers1