Factorials in LISP

A simple program that I wrote using LISP to ask the user to give a number and then the program will compute the factorial value of the given number.

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Sample Program Output

Program Listing

factorial.lisp

(setf fact 1)

(defun facto(n)

    ( loop for x from 2 to n

           do(setq fact (* x fact))

           )

    (write fact)

    (princ ".")

    )

(terpri)

(princ "Factorial a Number in LISP ")

(terpri)

(terpri)

(princ "Created By Mr. Jake R. Pomperada")

(terpri)

(terpri)

(princ "Give a Number : ")

(setq a (read))

(terpri)

(princ "The factorial value is ")

(facto  a)