Ethiopian multiplication: Difference between revisions

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=={{header|Emacs Lisp}}==
Emacs Lisp has <code>cl-evenp</code> in cl-lib.el (its Common Lisp library), but for the sake of completeness the desired effect is achieved here via <code>mod</code>.
<lang lisp>(defun even-p (n)
(defun even-p (n)
(= (mod n 2) 0))
(defun halve (n)
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(setq l (halve l))
(setq r (double r)))
sum))</lang>
</lang>
 
=={{header|Erlang}}==
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