Node:cons, Next:nthcdr, Previous:car & cdr, Up:car cdr & cons
cons function constructs lists; it is the inverse of
cdr. For example,
cons can be used to make
a four element list from the three element list,
(fir oak maple):
(cons 'pine '(fir oak maple))
After evaluating this list, you will see
(pine fir oak maple)
appear in the echo area.
cons puts a new element at the
beginning of a list; it attaches or pushes elements onto the list.