User:Eriksiers/Alternate CLISP exponentiation: Difference between revisions
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This is a better example of exponent (it doesn't solve for negatives however so I will leave in tact the other example):
<syntaxhighlight lang="lisp">
(defun ^ (a b)
(let ((r 1))
(dotimes (x b r)
(setf r (* r a)))))
</syntaxhighlight>
<small>(The above example is by [[User:Ahungry|Ahungry]].)</small>
I wrote this while reading the first few chapters of [http://www.gigamonkeys.com/book/ Practical Common Lisp]. (I'm about halfway through chapter 4 right now.) It ''seems'' to work -- at least for me, using [[CLISP]] -- and I ''think'' it might be a better version than the "real" solution provided at [[Exponentiation operator#Common Lisp]], but I'm still way too green to know for sure. (This version can handle negative values of '''b''', whereas that version can't -- I think.)
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Later, I might update this to handle [[Nth root|b as a float]].
<
; b must be an integer
; a can be integer or floating-point
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)
)
)</
Sample outputs:
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