COND (an alternative to IF)

The COND form uses of a kind of abstraction from nested IF forms.

> (define (small-prime? n)

; Returns T if n is a small prime.

(cond ((= n 2) #t)

((= n 3) #t)

((= n 5) #t)

((= n 7) #t)

(#t #f) ) )

> (small-prime? 9)

#f

> (small-prime? 3)

#t

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