COND (an alternative to IF)

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

> (defun small-prime-p (n)

"Returns T if n is a small prime."

(cond ((= n 2) t)

((= n 3) t)

((= n 5) t)

((= n 7) t)

(t nil) ) )

SMALL-PRIME-P

> (small-prime-p 9)

NIL

> (small-prime-p 3)

T

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