Math.SQRT2

Math.SQRT2 静态数据属性表示 2 的平方根,大约为 1.414。

¥The Math.SQRT2 static data property represents the square root of 2, approximately 1.414.

Try it

¥Value

𝙼𝚊𝚝𝚑.𝚂𝚀𝚁𝚃𝟸 = 2 1.414 \mathtt{Math.SQRT2} = \sqrt{2} \approx 1.414

Property attributes of Math.SQRT2
Writable no
Enumerable no
Configurable no

描述

¥Description

Math.SQRT2 是一个常量,与 Math.sqrt(2) 等效,性能更高。

¥Math.SQRT2 is a constant and a more performant equivalent to Math.sqrt(2).

因为 SQRT2Math 的静态属性,所以你始终将其用作 Math.SQRT2,而不是用作你创建的 Math 对象的属性(Math 不是构造函数)。

¥Because SQRT2 is a static property of Math, you always use it as Math.SQRT2, rather than as a property of a Math object you created (Math is not a constructor).

示例

¥Examples

使用 Math.SQRT2

¥Using Math.SQRT2

以下函数返回 2 的平方根:

¥The following function returns the square root of 2:

js
function getRoot2() {
  return Math.SQRT2;
}

getRoot2(); // 1.4142135623730951

规范

Specification
ECMAScript Language Specification
# sec-math.sqrt2

¥Specifications

浏览器兼容性

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¥Browser compatibility

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