University
of Washington • CSE583 • D. Notkin © 2000
19
The empty list
l() is the empty list literal
–In Lisp, this is the
same as nil; in some Scheme
implementations, it is the same as #f as well
l(cons 6 ()) ® (6)
–The second argument to cons must be a
list
l(cdr (cons
6 ()) ® ()
l(cdr 6) ® ???