chickadee » scheme » procedure?

Returns #t if obj is a procedure, otherwise returns #f.

(procedure? car)                    ===>  #t
(procedure? 'car)                   ===>  #f
(procedure? (lambda (x) (* x x)))   
                                    ===>  #t
(procedure? '(lambda (x) (* x x)))  
                                    ===>  #f
(call-with-current-continuation procedure?)
                                    ===>  #t