18

LIST OPERATIONS


( null? x )

( null? ( ) )

	\fI#t\fR


( car x )          ; first element of nonempty list x

( cdr x )          ; the rest of the list after 1st element
                           is  removed


( cons a x )


( car ( cons a x ) )  => a

( cdr ( cons a x ) )  => x


( car ( cdr x ) )

( cadr x )