Is Lisp the only language with REPL?

Question

There are languages other than Lisp (ruby, scala) that say they use REPL (Read, Eval, Print, Loop), but it is unclear whether what is meant by REPL is the same as in Lisp. H

Answer 1

There's a nice project called multi-repl which exposes various REPLs via Node.JS:

https://github.com/evilhackerdude/multi-repl

If you look at the list of supported languages, it's quite clear that not only Lisp has the concept of a REPL.

• clj (clojure)
• ghci (ghc)
• ipython
• irb (ruby)
• js (spidermonkey)
• node
• python
• sbcl
• v8

In fact implementing a trivial one in Ruby is fairly easy:

repl = -> prompt { print prompt; puts(" => %s" % eval(gets.chomp!)) }
loop { repl[">> "] }