I want to add a text box and a button and input page number in text box and after clicking button go to page number from text box.
Like in this screenshot:
Unfortunately, that isn’t the kind of thing that L&L is designed to do at the moment. There’s currently an open feature request to add the option to update the URL when navigating paginated loops. If that feature gets developed, then it seems like you could achieve this kind of functionality with a bit of javascript.