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---
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>Die <strong><code>Number.NaN</code></strong> Eigenschaft repräsentiert Not-A-Number (keine Nummer). Sie ist identisch zu {{jsxref("NaN")}}.</p>

<div>{{EmbedInteractiveExample("pages/js/number-nan.html")}}</div>

<p>Die Eigenschaft <code>Number.NaN</code> ist statisch, weshalb kein {{jsxref("Number")}} Objekt erstellt werden muss.</p>

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

<h2 id="Spezifikationen">Spezifikationen</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Spezifikation</th>
   <th scope="col">Status</th>
   <th scope="col">Kommentar</th>
  </tr>
  <tr>
   <td>{{SpecName('ES1')}}</td>
   <td>{{Spec2('ES1')}}</td>
   <td>
    <p>Initiale Definition. Implementiert in JavaScript 1.1.</p>
   </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="Browserkompatibilität">Browserkompatibilität</h2>

<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>

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

<h2 id="See_also" name="See_also">Siehe auch</h2>

<ul>
 <li>Das globale {{jsxref("NaN")}} Objekt.</li>
 <li>Das {{jsxref("Number")}} Objekt.</li>
</ul>