title: Dart - Adding a recurring character to an integer
body: <p>I'm working with long integers in <strong>dart</strong> and want to know how to add a comma after every three numbers.</p>
  
  <p>Example;</p>
  
  <p><code>999999999</code> would turn into <code>999,999,999</code></p>
  
  <p>I get this information from an online API, so I can't change the int from a local file and follow that pattern, I need to intercept the int before/as it's being displayed.</p>
  
  <p>Thanks</p>