Number() constructor

The Number() creates a Number object.

Syntax

new Number(value)

Parameters

value

The numeric value of the object being created.

Examples

Creating Number objects

const a = new Number('123'); // a === 123 is false
const b = Number('123');     // b === 123 is true
a instanceof Number;         // is true
b instanceof Number;         // is false

Specifications

Specification
ECMAScript Language Specification (ECMAScript)
# sec-number-constructor

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
Number
1
12
1
3
3
1
1
18
4
10.1
1
1.0

See also

  • A polyfill of modern Number behavior (with support binary and octal literals) is available in core-js
  • NaN
  • The Math global object
  • Integers with arbitrary precision: BigInt

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/Number