letrec even? (n) = if zero? (n)
else (odd? sub1 (n))
odd? (n) = - (1, (even? n))
in (even? 4)
Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.
Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!