This is some thing I see all the time recently and not just from new users.
Users are using > to format there code and that is just wrong.
Code should be formatted in one of these three ways
Surround the code with ``
sudo apt install
Indent by four spaces
sudo apt install
or use the code button in the editor {}.
This > creates a quote
sudo apt install
Same as the "" button in the editor.
Quotes are for when you quote a person or page directly and does not stand out as well as the code formatting.
This seems to be coming more common and is being over looked, in this answer a 4k user used > for code and then a moderator edited it and still missed the > on the code.
Please use correct formatting, it wastes users time to have to edit this kind of thing and may even get you downvoted.