foreach
(foreach symbol list term1 ...)
The foreach function assigns each element in a list to the specified symbol and evaluates the specified expression for each element of the list.
The function returns the result of the last expression evaluated.
: (foreach el '(1 2 3) (princ el))
1233
: (setq x 0)
0
: (foreach el '(1 2 3) (setq x (+ x el)) (princ x)(terpri))
1
3
6
nil