Yes. In Lisp there is no difference between how code is stored and how data are stored. Both are available to the REPL (a command line interface) which does all

Yes. In Lisp there is no difference between how code is stored and how data are stored. Both are available to the REPL (a command line interface) which does allow for a different style of "live" development. Although Lisp is powerful and fun, it's of note that the inventor of Lisp quickly turned his back on the concept to invent Algol -- which is the basis of nearly all other modern languages that aren't Lisps. In practice, mixing code and data often turns out to make things worse.