Math.LN2 - JavaScript 编辑

The Math.LN2 property represents the natural logarithm of 2, approximately 0.693:

$$\mathtt{\mi{Math.LN2}} = \ln(2) \approx 0.693$$

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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.LN2
Writable	no
Enumerable	no
Configurable	no

Description

Because LN2 is a static property of Math, you always use it as Math.LN2, rather than as a property of a Math object you created (Math is not a constructor).

Examples

Using Math.LN2

The following function returns the natural log of 2:

function getNatLog2() {
  return Math.LN2;
}

getNatLog2(); // 0.6931471805599453

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'Math.LN2' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

• Math.exp()
• Math.log()
• Math.log2()