title: Why does a memory address start with 0x?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2670639/why-are-hexadecimal-prefixed-as-0x">Why are Hexadecimal Prefixed as 0x?</a>  </p>
  </blockquote>
  
  
  
  <p>Memory addresses are often notated as a hexidecimal value prefixed with <code>0x</code>. E.g:</p>
  
  <pre><code>&gt; new.env()
  &lt;environment: 0x21d36e0&gt;
  </code></pre>
  
  <p>Does the <code>0x</code> part mean anything? Where does this notation come from? Is any other value possible instead of <code>0x</code>?</p>