Returns the third element of a list
(caddr list)
In AutoLISP, caddr is frequently used to obtain the Z coordinate of a 3D point (the third element of a list of three reals).
The third element in list; otherwise nil, if the list is empty or contains fewer than three elements.
Command: (setq pt3 '(5.25 1.0 3.0))
(5.25 1.0 3.0)
Command: (caddr pt3)
3.0
Command: (caddr '(5.25 1.0))
nil
See Also
-
The
Point Lists topic in the AutoLISP Developer's Guide.