LISP on browser¶ This is small implementation of LISP, which written in JavaScript and run on browsers. I think it helps you to understand what going on in programming languages by using it and reading its source codes. ;; A few examples. Click 'Load source' to load them. ; Closures (let (count 0) (define (counter) (set! count (+ 1 count)))) ; You can also define variables (define x 2) (set! x 3)