Comments

;; (foo bar)

Strings

(foo "bar")

With nested symbols

(foo "A string with a `symbol ")

With nested arguments

(foo "A string with an ARGUMENT ")

Quoted symbols

(foo #'bar)

Lisp properties

(foo :bar)

Splices

(foo ,bar ,@bar)

Keywords

(let foo (bar arg))

Declarations

(declare foo)

Booleans

(foo t)

(foo nil)

Numbers

(foo 1)

(foo -1.5)

Definitions

(defvar bar 23)

(defcustom bar 23)

Function definitions

(defun multiply-by-seven (number)
       "Multiply NUMBER by seven."
       (* 7 number))

Lambda expressions

(lambda (number) (* 7 number))