#### 1.4.1 Literal Expressions ¶

Literal constants may be written by using an external representation of the data. In general, the external representation must be quoted (see Quoting); but some external representations can be used without quotation.

    "abc"                                   ⇒  "abc"
    145932                                  ⇒  145932
    #t                                      ⇒  #t
    #\a                                     ⇒  #\a

The external representation of numeric constants, string constants, character constants, and boolean constants evaluate to the constants themselves. Symbols, pairs, lists, and vectors require quoting.