Math.LOG2EMath.LOG2E 静态数据属性表示 e 以 2 为底的对数,大约为 1.442。 ¥The Math.LOG2E static data property represents the base 2 logarithm of e, approximately 1.442.Try it 值¥Value 𝙼𝚊𝚝𝚑.𝙻𝙾𝙶𝟸𝙴 = log 2 ( e ) ≈ 1.442 \mathtt{Math.LOG2E} = \log_2(\mathrm{e}) \approx 1.442 Property attributes of Math.LOG2E Writable no Enumerable no Configurable no 描述¥Description 因为 LOG2E 是 Math 的静态属性,所以你始终将其用作 Math.LOG2E,而不是用作你创建的 Math 对象的属性(Math 不是构造函数)。 ¥Because LOG2E is a static property of Math, you always use it as Math.LOG2E, rather than as a property of a Math object you created (Math is not a constructor). 示例¥Examples 使用 Math.LOG2E¥Using Math.LOG2E 以下函数返回 e 以 2 为底的对数: ¥The following function returns the base 2 logarithm of e: jsfunction getLog2e() { return Math.LOG2E; } getLog2e(); // 1.4426950408889634 规范SpecificationECMAScript Language Specification # sec-math.log2e¥Specifications 浏览器兼容性BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.¥Browser compatibility 也可以看看¥See also Math.exp() Math.log() Math.log2()