[DUPLICATE] what for xp points?

Question

For what else can I get xp points to jump to next level ?
Is that question's stupid ? :(

Answer 1

https://code.sololearn.com/ctzdTx1yEWV1/?ref=app

Answer 2

Thanks.
Can I correct my wrong answers later ? get more xp ?

Answer 3

what if I loose challange. I'll loose my xp too ?

Answer 4

Now, after couple months my questions look at least funny :)
Thank You SOLOLEARN!

Answer 5

How many Time have you spent to jump from 16 to the next one?
I think it's imposible for a couple minute a Day. :(
Any advice?