I can't complete the input() command in jupyter notebook

when I type in the jupyter notebook the command name=input(“enter your name”) it comes out as soon as I type the first letter

Does it run the code though or do something different?

Do you have any browser extensions enabled?

When I type a letter it leaves the cell and enters Markdown in the first cell
Thanks

So that issue has been discussed a lot already on this site.
Before creating a new post, always a good exercise to fully describe the issue and then search around using the involved terms as search terms and look at the latest results. After considering those, if you think your issue is completely unrelated, then feel free to post.
(Along those lines, I suggest for next time reading Getting good answers to your questions.)

Searching ‘markdown input’ on this site gives these recent results: