How call a function, when the user confirms the question?

Question

I'm trying to write some Emacs Lisp. But I stumble on one thing. The code is structured as following:

(defun foo ()
    (interactive)
    (if (yes-or-no-p "Do you want to call the function bar?")
        (progn 
            'bar
            ))
            )


(defun bar (string)
  (interactive "sType your input here? ")
  (message string))

Okay, when the user confirms the question, the function bar will be called. But nothing happens when I press y.

When reading the Elisp cookbooks and tutorials, they all says that yes-or-no-p functions returns a true when the user confirmed it. And the if is structured as following:

COND THEN ELSE

So the second argument should be calling since yes-or-no-p evaluates to true. Since this seems not the case, I'm missing something?

Answer 1

To call bar, use (bar "string") or (call-interactively 'bar) depending on how you want to specify the argument of bar.