Using DrRacket v5.3.6, if I enter:
(define (tax pay)
(cond
((<= pay 240.0) 0)
((<= pay 480.0) (* (/ 15 100) pay))
((else ((+ (* (/ 15 100) 480) (* (/ 28 100) (- pay 480))))))))
I get error
else: not allowed as an expression in: (else ((+ (* (/ 15 100) 480) (* (/
28 100) (- pay 480)))))
Can you not have an expression in an else clause? Can an else only contain
a simple value? What am I doing wrong?
This is HTDP ex 4.4.2 by the way.
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