Clojure - 用大数字计算 [英] Clojure - Calculate with big numbers

问题描述

我想在 clojure 中计算 !1000，我怎么做才不会出现整数溢出异常?

I want to calculate !1000 in clojure, how can I do this without getting a integer-overflow exception?

我现在的阶乘代码是:(reduce * (range 1 1001)).

My factorial code is right now: (reduce * (range 1 1001)).

推荐答案

您可以使用 *' 运算符，该运算符通过自动将结果提升到 BigInt 来支持任意精度，以防它溢出:

You could use the *' operator which supports arbitrary precision by automatically promoting the result to BigInt in case it would overflow:

(reduce *' (range 1 1001))

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