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+---
+title: Number.EPSILON
+slug: Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+tags:
+ - ECMAScript 2015
+ - JavaScript
+ - Number
+ - Property
+translation_of: Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+---
+<div>{{JSRef}}</div>
+
+<p>Die Eigenschaft <strong><code>Number.EPSILON</code></strong> beschreibt den Unterschied zwischen 1 und der kleinsten Gleitpunktzahl größer als 1.</p>
+
+<p>Man muss kein Objekt von Typ {{jsxref("Number")}}  erzeugen, um auf diese statische Eigenschaft zuzugreifen. Man muss nur <code>Number.EPSILON</code> aufrufen.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/number-epsilon.html")}}</div>
+
+
+
+<div>{{js_property_attributes(0,0,0)}}</div>
+
+<h2 id="Description" name="Description">Beschreibung</h2>
+
+<p>Die <code>EPSILON</code> Eigenschaft hat einen ungefähren Wert von <code>2.2204460492503130808472633361816E-16</code> order <code>2<sup>-52</sup></code>.</p>
+
+<h2 id="Examples" name="Examples">Beispiele</h2>
+
+<h3 id="Testgleichung">Testgleichung</h3>
+
+<pre class="brush: js">x = 0.2;
+y = 0.3;
+z = 0.1;
+equal = (Math.abs(x - y + z) &lt; Number.EPSILON);</pre>
+
+<h2 id="Polyfill">Polyfill</h2>
+
+<pre class="brush: js line-numbers language-js"><code class="language-js"><span class="keyword token">if</span> <span class="punctuation token">(</span>Number<span class="punctuation token">.</span>EPSILON <span class="operator token">===</span> undefined<span class="punctuation token">) </span><span class="punctuation token">{</span>
+ Number<span class="punctuation token">.</span>EPSILON <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">pow</span><span class="punctuation token">(</span><span class="number token">2</span><span class="punctuation token">,</span> <span class="operator token">-</span><span class="number token">52</span><span class="punctuation token">)</span><span class="punctuation token">;
+}</span></code>
+</pre>
+
+<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('ES2015', '#sec-number.epsilon', 'Number.EPSILON')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Initiale Definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-number.epsilon', 'Number.EPSILON')}}</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.EPSILON")}}</p>
+
+<h2 id="See_also" name="See_also">Siehe auch</h2>
+
+<ul>
+ <li>Das {{jsxref("Number")}} Objekt.</li>
+</ul>