Math.SQRT2 - JavaScript 编辑

The Math.SQRT2 property represents the square root of 2, approximately 1.414:

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

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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

Description

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).

Examples

Using Math.SQRT2

The following function returns the square root of 2:

function getRoot2() {
  return Math.SQRT2;
}

getRoot2(); // 1.4142135623730951

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'Math.SQRT2' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

• Math.pow()
• Math.sqrt()