Armstrong Number Check/Generation - LISP

1.To Check

Program

(defun str(n)
        (setf num n sum 0)
        (loop while (/= n 0) do
            (setf digit (mod n 10))
            (setf sum (+ sum (* (* digit digit) digit)))
            (setf n (floor n 10))
        )
        (if(= sum num) (print "Armstrong Number....")
            (print "Not a Armstrong Number....")
        )
t)

Output:

Break 20 [21]> (load 'arstr.lsp)
;;       Loading file arstr.lsp ...
;;       Loaded file arstr.lsp
T
Break 20 [21]> (str 153)

"Armstrong Number...."
T
Break 20 [21]>


2.To Generate

Program:

(defun arm(rang)
    (do((j 1 (+ j 1))) ((= j rang))
        (setf n j)
        (setf num n sum 1)
        (loop for i from n above 0 do
            (setf f1 (mod n 10))
            (setf sum (+ sum (* (* f1 f1) f1)))
            (setf n (floor n 10))
            (setf i n)
        )
        (if(= sum num) (print num))
    )
t       
)

Output:

Break 15 [16]> (load 'arm.lsp)
;;    Loading file arm.lsp ...
;;    Loaded file arm.lsp
T
Break 15 [16]> (str 157)

153
T
Break 15 [16]>