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Introducing Locals: Let

3. Internal definitions: the special form, LET

    (let (  (x ‘(a b c))
            (y ‘(d e f))   )
        (cons x y)
    )

• Introduces a list of local names (use define for top-level entities, but use let for internal definitions)

• Each name is given a value

• Use let* if later values depend on earlier ones