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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>