The Importance of Lists

• Lists represent both programs and data!

• Three basic operations on lists:

  • CAR returns the head of a list
    • (car '(a b c))
      a
  • CDR returns the tail of a list
    • (cdr '(a b c))
      (b c)
  • CONS adds an item to the front of a list
    • (cons 'a '(b c))
      (a b c)

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