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  1. 개발자를 위한 웹 기술
  2. JavaScript
  3. JavaScript 참고서
  4. 표준 내장 객체
  5. Number
  6. Number() 생성자
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Number() 생성자

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015년 7월.

Number() 생성자는 Number 객체를 생성합니다.

In this article

구문

js
new Number(value);

매개변수

value

만들어질 객체의 숫자 값.

예제

Number 객체 만들기

js
const a = new Number("123"); // a === 123 은 거짓 const b = Number("123"); // b === 123 은 참 a instanceof Number; // 참 b instanceof Number; // 참

명세

Specification
ECMAScript® 2027 Language Specification
# sec-number-constructor

브라우저 호환성

Enable JavaScript to view this browser compatibility table.

같이 보기

  • 최신 Number 동작(2진수와 8진수를 지원하는)의 폴리필은 core-js를 참고하세요
  • NaN
  • Math 전역 객체
  • 임의 정밀도 정수: BigInt

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This page was last modified on 2023년 8월 8일 by MDN contributors.

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  1. 표준 내장 객체
  2. Number
  3. 생성자
    1. Number() 생성자
  4. 정적 메서드
    1. Number.isFinite()
    2. Number.isInteger()
    3. Number.isNaN()
    4. Number.isSafeInteger()
    5. Number.parseFloat()
    6. Number.parseInt()
  5. 정적 속성
    1. Number.EPSILON
    2. Number.MAX_SAFE_INTEGER
    3. Number.MAX_VALUE
    4. Number.MIN_SAFE_INTEGER
    5. Number.MIN_VALUE
    6. Number.NaN
    7. Number.NEGATIVE_INFINITY
    8. Number.POSITIVE_INFINITY
  6. 인스턴스 메서드
    1. Number.prototype.toExponential()
    2. Number.prototype.toFixed()
    3. Number.prototype.toLocaleString()
    4. Number.prototype.toPrecision()
    5. Number.prototype.toString()
    6. Number.prototype.valueOf()
  7. 상속
  8. Object/Function
  9. 정적 메서드
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype[@@hasInstance]()
  10. 정적 속성
    1. Function: displayName
    2. Function.prototype.length
    3. Function: name
    4. Function
    5. Function.arguments
    6. Function.prototype.caller
  11. 인스턴스 메서드
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  12. 인스턴스 속성
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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