Lisp - dolist construct

The dolist construct allows iteration of each element of a list.

Syntax

(dolist (n list)
   statement1
   ...
)

• n − item of list.

• list − list to be iterated.

• statement₁ − statement(s) to be evaluated.

Example - Print all elements of a list

For example, Create a new source code file named main.lisp and type the following code in it −

main.lisp

; perform a dolist operation on list of numbers
(dolist (n '(1 2 3 4 5))
   (print n) ; print the number
)

Output

When you click the Execute button, or type Ctrl+E, LISP executes it immediately and the result returned is −

1
2
3
4
5

Example - Qube of Numbers

Update the source code file named main.lisp and type the following code in it −

main.lisp

; perform a dolist operation on list of numbers
(dolist (n '(1 2 3 4 5))
   (print n) (prin1 (* n(* n n))) ; print the qube of number
)

Output

When you click the Execute button, or type Ctrl+E, LISP executes it immediately and the result returned is −

1 1
2 8
3 27
4 64
5 125

Example - Double of a Number

Update the source code file named main.lisp and type the following code in it −

main.lisp

; perform a dolist operation on list of numbers
(dolist (n '(1 2 3 4 5))
   (print n) (prin1 (+ n n)) ; print double of number
)

Output

When you click the Execute button, or type Ctrl+E, LISP executes it immediately and the result returned is −

1 2
2 4
3 6
4 8
5 10