JavaScript随机函数会返回0还是1? [英] Will JavaScript random function ever return a 0 or 1?

问题描述

JavaScript的 Math.random()是否可以返回正好为0或1的数字?

Can JavaScript's Math.random() ever return exactly a 0 or 1?

推荐答案

根据ECMAScript规范:

From the ECMAScript specification:

返回带正号的数字值，该值大于或等于0但小于1，随机或伪随机选择，近似使用实现相关的算法或策略.该功能不需要争论.

Returns a Number value with positive sign, greater than or equal to 0 but less than 1, chosen randomly or pseudo randomly with approximately uniform distribution over that range, using an implementation-dependent algorithm or strategy. This function takes no arguments.

来源: http://ecma-international.org/ecma-262/5.1/#sec-15.8.2.14

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