When I do (/ 411 125) , I don't get it in terms of decimal. How do I do that?
user> (float (/ 411 125))
3.288
user> (double (/ 411 125))
3.288
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
As documented, integer division yields rational numbers. Try
(/ 411.0 125)
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.
even this will work:
(/ 22. 7) => 3.142857142857143
(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. ;)
来源：https://stackoverflow.com/questions/1596484/when-i-divide-numbers-in-clojure-i-get-a-fraction-how-do-i-get-the-decimal