clojure.core/rationalize

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Type: function Added: Clojure 1.0 Examples: 4 Runnable: 3

([num])

returns the rational value of num

Examples

by Miles on 2010-09-07 . May have evaluation errors. ▶

<pre> (rationalize 1.5) 3/2 </pre>

by devn on 2012-04-26 ▶

(rationalize Math/PI) 3141592653589793/1000000000000000 (rationalize (Math/sqrt 2)) 14142135623730951/10000000000000000

by Dimagog on 2015-02-04 ▶

(rationalize 2/4) ;; => 1/2 (rationalize 4/2) ;; => 2 (rationalize 2) ;; => 2 (rationalize 2.0) ;; => 2N

by mhmdsalem1993 on 2017-05-18 ▶

;; To quickly convert a mixed number to an improper fraction, ;; multiply the denominator ;; by the whole number and add to the numerator (= (+ 20 3/4) (rationalize (/ (+ (* 20 4) 3) 4))) ;; => true

Note by wikopl

Remember that for irrational numbers, like sqrt 2, this is only an estimate (pretty good one).

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