---
title: Number.NaN
slug: Web/JavaScript/Reference/Global_Objects/Number/NaN
tags:
  - JavaScript
  - Number
  - Property
translation_of: Web/JavaScript/Reference/Global_Objects/Number/NaN
---
<div>{{JSRef}}</div>

<p><strong><code>Number.NaN</code></strong> 속성은 Not-A-Number(숫자가 아님)를 나타냅니다. {{jsxref("NaN")}}과 같습니다.</p>

<p>{{EmbedInteractiveExample("pages/js/number-nan.html")}}<br>
 정적 속성이므로 접근하기 위해 {{jsxref("Number")}} 객체를 생성할 필요는 없습니다. (<code>Number.NaN</code> 사용)</p>

<div>{{js_property_attributes(0, 0, 0)}}</div>

<h2 id="명세">명세</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">스펙</th>
   <th scope="col">상태</th>
   <th scope="col">설명</th>
  </tr>
  <tr>
   <td>{{SpecName('ES1')}}</td>
   <td>{{Spec2('ES1')}}</td>
   <td>초기 정의. JavaScript 1.1에서 구현됨.</td>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.7.3.4', 'Number.NaN')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-number.nan', 'Number.NaN')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-number.nan', 'Number.NaN')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="브라우저_호환성">브라우저 호환성</h2>

<div>{{Compat("javascript.builtins.Number.NaN")}}</div>

<div id="compat-desktop"> </div>

<h2 id="같이_보기">같이 보기</h2>

<ul>
 <li>전역 {{jsxref("NaN")}} 객체.</li>
 <li>본 속성이 속한 {{jsxref("Number")}} 객체.</li>
</ul>