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;;; difference-of-squares.el --- Difference of Squares (exercism)
;;; Commentary:
;;; Code:
(require 'cl)
(defun square-of-sum (n)
(cl-loop for i from 1 to n
sum i into s
finally return (* s s)))
(defun sum-of-squares (n)
(cl-loop for i from 1 to n
sum (* i i)))
(defun difference (n)
(- (square-of-sum n) (sum-of-squares n)))
(provide 'difference-of-squares)
;;; difference-of-squares.el ends here
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