chickadee » scheme » pair?

Pair? returns #t if obj is a pair, and otherwise returns #f. NOTE: Weak pairs are regarded as pairs by this procedure.

(pair? '(a . b))                ===>  #t
(pair? '(a b c))                ===>  #t
(pair? '())                     ===>  #f
(pair? '#(a b))                 ===>  #f
(pair? (cons 1 2))              ===>  #t

(import (chicken base))
(pair? (weak-cons 1 2))         ===>  #t