clojure中rem和mod的区别 详见clojure doc

看例子

01	user=> (mod 10 5)

02

0

03

04	user=> (mod 10 6)

05

4

06

07	user=> (mod 10 10)

08

0

09

10	user=> (mod 10 -1)

11

0

12

13	;; The mod function is defined as the amount by which a number exceeds the largest integer multiple of the divisor that is not greater than that number.

14	;; The largest integer multiple of 5 not greater than -2 is 5 * -1 = -5. The amount by which -2 exceeds -5 is 3.

15

;;

16	user=> (mod -2  5)

17

3

01	;; rem和mod通常用于求余数

02	;; mod的结果不为负数    此处文档有误   当（mod 10 -3）时输出为 -2

07	user=> (mod -10 3)

08

2

09	;; -10 mod 3 (-12 mod 3 )

10ss	user=> (rem -10 3)

11

-1