Why is there three dot after a elif statement

Question

https://code.sololearn.com/cyq01VBhLk1b/?ref=app

Answer 1

First correct the indentation errors after the if statement

Answer 2

... is the literal for an object calles 'Ellipsis' that is used in some situations.

In this situation it looks like the... in a text, but you could write any sort of object instead of it - like just a 1, True, False, a string and have the same effect.

The normal way to write a line of placeholder code is 'pass'.