Jumping to a specified window in Emacs doesn't work when done programatically

Question

I am trying to select the third window (I have opened 6 in my frame) in Emacs.

The problem is that this:

(select-window 3) 

doesn't work.

It throws this error in debugger:

(wrong-type-argument window-live-p 3)

How to make it work?

Answer 1

select-window takes a window object as argument, not a number. The function window-list gives you a list of window objects in the current frame. You can select one of them to pass to select-window , eg

(select-window (nth 2 (window-list)))

will select the window that is the third[1] element of the list that window-list returns.

Do Ch f nth and Ch f window-list for more information on these functions.

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[1] Note that list elements are indexed from 0.