Math.E - JavaScript 编辑

The Math.E property represents the base of natural logarithms, e, approximately 2.718.

$$\mathtt{\mi{Math.E}} = e \approx 2.718$$

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.E
Writable	no
Enumerable	no
Configurable	no

Description

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

Examples

Using Math.E

The following function returns e:

function getNapier() {
  return Math.E;
}

getNapier(); // 2.718281828459045

Specifications

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

Browser compatibility

BCD tables only load in the browser

See also

• Math.exp()
• Math.log()
• Math.log1p()