Searches an association list for an element and returns that association list entry
(assoc element alist)
Key of an element in an association list.
An association list to be searched.
assoc does not find element as a key in alist, it returns nil.The alist entry, if successful. If
Command: (setq al '((name box) (width 3) (size 4.7263) (depth 5)))
((NAME BOX) (WIDTH 3) (SIZE 4.7263) (DEPTH 5))
Command: (assoc 'size al)
Command: (assoc 'weight al)