Why is the output of the code 9?

Question

a = [2, 1, 2, 4]
a[1:].remove(2)
print(sum(a))

Answer 1

Mofetoluwa Balogun ,

I assume you're trying to remove the second instance of 2 without using pop(), because maybe you don't know the index in some hypothetical scenario.

I thought of something. It won't work on a list with three 2s though.

https://code.sololearn.com/cr4b3uslvWjp/?ref=app

Answer 2

The print is calling for the sum of the list before it was altered.

The alteration has created a new object with a different ID.

The original ID is referenced by the last line of code.

Refer to attached code for details

https://code.sololearn.com/ctHZ7jTTfS5E/?ref=app

Answer 3

Thanks, Rain that's exactly the answer I needed

Answer 4

Mofetoluwa Balogun ,

Cool. 😎

Answer 5

Rik Wittkopp So how do I do it to actually make it print the correct value after it is altered?

Answer 6

Input is not take in C language