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Primitive Functions

1. Arithmetic: +, -, *, /, abs, sqrt

    (+ 5 2)
    (* 47 (+ (- 5 3) 2))

2. QUOTE takes one parameter; returns the parameter without evaluation

• Parameters to a function are evaluated before applying the function; use QUOTE to prevent it when inappropriate

• QUOTE can be abbreviated with the apostrophe prefix operator

      '(a b)
      (quote (a b))