How to move the point around in buffers in Emacs Lisp?

(point) ;; 349
(point-min) ;; 1
(point-max) ;; 385
(goto-char 349)
(goto-char (point-min))
(goto-char (point-max))

(forward-char 4)
(backward-char 4)

(beginning-of-line)
(end-of-line)