666 ; this is an end-of-line comment

#|
 This is a multi-line comment
 Nesting is not allowed
|#

;; The (info <name> [<string>)] function associates a symbol and a comment
;; These info strings are saved in permanent memory (local storage)
;; Unicode characters may be used, as everywhere in the language

(define mynumber 666) → mynumber
(info 'mynumber "👀 Symbols may be commented with an information string 👺")
(info 'mynumber) → displays the above inside the 'info' field.