title: Javascript check if pincode has 4 digits
body: <p>I tried to make a javascript that checks if you entered 4 digits but I'm getting an error saying break is an illegal statement. I'm new to loops and strings so I don't see the error.</p>
  
  <pre><code>var pin = "";
  var lengte =0;
  
  while(true)
  {
      pin = prompt("voer hier je pincode in");
      lengte = pin.lenght;
      document.write(lengte);
      if (lengte == 4){break}
      alert("U heeft geen pincode ingevoerd");
  }
  alert('ok');
  </code></pre>