clojure - Clojure 中 mod 和 rem 的区别

Question

我无法理解这两个 (mod 和 rem) 函数之间的区别。

Answer 1

Clojuredoc 的 rem 示例描述差异:

;; rem and mod are commonly used to get the remainder.
;; mod means Gaussian mod, so the result is always
;; non-negative.  Don't confuse it with ANSI C's %
;; operator, which despite being pronounced
;; 'mod' actually implements rem, i.e. -10 % 3 = -1.

user=> (mod -10 3)
2

user=> (rem -10 3)
-1