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[[syntax]] (quote <datum>) [[syntax]] '<datum> [[syntax]] <constant>
(quote <datum>) evaluates to <datum>. <Datum> may be any external representation of a Scheme object (see section 3.3). This notation is used to include literal constants in Scheme code.
(quote a) => a (quote #(a b c)) => #(a b c) (quote (+ 1 2)) => (+ 1 2)
(quote <datum>) may be abbreviated as '<datum>. The two notations are equivalent in all respects.
'a => a '#(a b c) => #(a b c) '() => () '(+ 1 2) => (+ 1 2) '(quote a) => (quote a) "a => (quote a)
Numerical constants, string constants, character constants, and boolean constants evaluate "to themselves"; they need not be quoted.
'"abc" => "abc" "abc" => "abc" '145932 => 145932 145932 => 145932 '#t => #t #t => #t
As noted in section 3.4, it is an error to alter a constant (i.e. the value of a literal expression) using a mutation procedure like set-car! or string-set!.
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