Math.E

La costante Math.E rappresenta la base del logaritmo naturale, e, equivale approssimativamente a 2.718.

Math.E=e2.718\mathtt{\mi{Math.E}} = e \approx 2.718

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

Descrizione

Poiché E è una proprietà statica di Math, lo si usa sempre come Math.E, piuttosto che come un metodo di un Oggetto Math appositamente creato (Math non ha un costruttore).

Esempi

Uso di Math.E

Il codice seguente restitusice e:

function getNapier() {
  return Math.E;
}

getNapier(); // 2.718281828459045

Specifiche

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262)
The definition of 'Math.E' in that specification.
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Math.E' in that specification.
Standard  
ECMAScript Latest Draft (ECMA-262)
The definition of 'Math.E' in that specification.
Draft  

Compatibilità Browser

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
EChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support YesSafari Full support YesWebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support 1.0nodejs Full support Yes

Legend

Full support  
Full support

Vedi anche