guile

GNU Scheme interpreter (67K lines info).

guile [options] [script [args]]

-L <dir>    Add load path
-l <file>   Load source
-e <func>   Apply function
-c <expr>   Evaluate expression
-s <script> Execute script

REPL

(define (factorial n)
  (if (<= n 1) 1 (* n (factorial (- n 1)))))

(use-modules (ice-9 match))
(match '(1 2 3) ((a b c) (+ a b c)))

Modules

(use-modules (srfi srfi-1))   ; List library
(use-modules (ice-9 receive)) ; Multiple values
(use-modules (ice-9 format))  ; Formatted output

REPL siblings

Scheme family: slime-lisp · geiser-chicken · little-schemer · scheme · srfi · guile-goblins-hoot · hoot. Cross-family: unison (codebase REPL) · clojure (nREPL). Atlas: repl-commons.