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+---
+title: Math.PI
+slug: Web/JavaScript/Reference/Global_Objects/Math/PI
+tags:
+  - JavaScript
+  - Math
+  - Property
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/PI
+---
+<div>{{JSRef}}</div>
+
+<p>Die <code><strong>Math.PI</strong></code> Eigenschaft repräsentiert die Kreiszahl Pi, welche als Verhältnis zwischen Kreisumfang und Durchmesser definiert ist und gerundet die Zahl 3,14159 ist.</p>
+
+<p><math display="block"><semantics><mrow><mstyle mathvariant="monospace"><mi>Math.PI</mi></mstyle><mo>=</mo><mi>π</mi><mo>≈</mo><mn>3,14159</mn></mrow><annotation encoding="TeX">\mathtt{\mi{Math.PI}} = \pi \approx 3,14159</annotation></semantics></math></p>
+
+<div>{{EmbedInteractiveExample("pages/js/math-pi.html")}}</div>
+
+
+
+<div>{{js_property_attributes(0,0,0)}}</div>
+
+<h2 id="Description" name="Description">Beschreibung</h2>
+
+<p>Weil <code>PI</code> eine statische Eigenschaft von <code>Math</code> ist, muss immer <code>Math.PI</code> genutzt werden, ohne dass ein <code>Math</code> Objekt erstellt wird (<code>Math</code> ist kein Konstruktor).</p>
+
+<h2 id="Examples" name="Examples">Beispiele</h2>
+
+<h3 id="Example:_Using_Math.E" name="Example:_Using_Math.E">Einsatz von <code>Math.PI</code></h3>
+
+<p>Die folgende Funktion benutzt <code>Math.PI</code>, um aus einem Radius den Umfrang eines Kreises zu berechnen:</p>
+
+<pre class="brush: js line-numbers  language-js"><code class="language-js"><span class="keyword token">function</span> <span class="function token">calculateCircumference</span><span class="punctuation token">(</span>radius<span class="punctuation token">)</span> <span class="punctuation token">{</span>
+  <span class="keyword token">return</span> Math<span class="punctuation token">.</span>PI <span class="operator token">*</span> <span class="punctuation token">(</span>radius <span class="operator token">+</span> radius<span class="punctuation token">)</span><span class="punctuation token">;</span>
+<span class="punctuation token">}</span>
+
+<span class="function token">calculateCircumference</span><span class="punctuation token">(</span><span class="number token">1</span><span class="punctuation token">)</span><span class="punctuation token">;</span>  <span class="comment token">// 6.283185307179586</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('ES1')}}</td>
+   <td>{{Spec2('ES1')}}</td>
+   <td>Initiale Definition. Implementiert in JavaScript 1.0.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.8.1.6', 'Math.PI')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-math.pi', 'Math.PI')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-math.pi', 'Math.PI')}}</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.Math.PI")}}</p>
+
+<h2 id="See_also" name="See_also">Siehe auch</h2>
+
+<ul>
+ <li>{{jsxref("Math")}}</li>
+</ul>