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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head>  <meta name="generator" content=  "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">  <title>using</title>  <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table>  <tr>  <td>  <div class="body-content">  <div class="header-box">    <a href="../index.html">cppreference.com</a> &gt; <a href=    "index.html">C/C++ Keywords</a> &gt; <a href="using.html">using</a>  </div>  <div class="name-format">    using  </div>  <p>The using keyword is used to import a <a href=  "namespace.html">namespace</a> (or parts of a namespace) into the  current scope.</p>  <div class="related-examples-format">    Example code:  </div>  <div class="related-examples">    <p>For example, the following code imports the entire <em>std</em>    namespace into the current scope so that items within that    namespace can be used without a preceeding &quot;std::&quot;.</p>    <pre class="example-code"> using namespace std;           </pre>    <p>Alternatively, the next code snippet just imports a single    element of the <em>std</em> namespace into the current    namespace:</p>    <pre class="example-code"> using std::cout;               </pre>  </div>  <div class="related-name-format">    Related topics:  </div>  <div class="related-content">    <a href="namespace.html">namespace</a>  </div>  </div>  </td>    </tr>  </table></body></html>

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