Lisp is not at all exclusively functional. The best Lisp is, but you can easily write iterative code in Lisp as well. It's just that most Lisp programmers don

Lisp is not at all exclusively functional. The best Lisp is, but you can easily write iterative code in Lisp as well. It's just that most Lisp programmers don't because they realize that the functional paradigm is usually superior in terms of creating clean, simple code that is easy to understand later.