当我在 Clojure 中除数时，我得到一个分数，我如何得到小数？

当我做 (/ 411 125)的时候，我不是用十进制表示的，我怎么做呢？

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As documented, integer division yields rational numbers. Try

(/ 411.0 125)

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If you use a float for the dividend, you'll get a decimal answer.

(/ 22.0 7) -> 3.142857142857143

There's also the (unchecked-remainder x y) function available.

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最佳答案

user> (float (/ 411 125))
3.288
user> (double (/ 411 125))
3.288

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user=> (clojure-version)
"1.4.0"


user=> (doc quot)
-------------------------
clojure.core/quot
([num div])
quot[ient] of dividing numerator by denominator.
nil


user=> (quot 411 125)
3

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(float 411/125) is another variant if you are given the numbers directly, which is the case if you are just using the REPL as a calculator. Unfortunately this is a few characters longer than the solution by Jonathan Feinberg and ire_and_curses. ;)

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even this will work:

(/ 22. 7) => 3.142857142857143