Does zsh functions have this feature?

[vinurs <haiyuan.vinurs@xxxxxxxxx>]

Hi all,
           As time goes on, my functions will be more and more. But, I
won't all of them will be treated as shell commands.
       In zsh, is there any feature like emacs lisp that  when I write a
function if I want it to be call by M-x, I should add
      (interactive)
       in it; if not, it will only be called by lisp programs.