title: Invisible characters - ASCII
body: <p>Are there any <strong>invisible</strong> characters? I have checked Google for invisible characters and ended up with many answers but I'm not sure about those. Can someone on Stack Overflow tell me more about this?</p>
  
  <p>Also I have checked a profile on Facebook and found that the user didn't have any name to his profile? How can this be possible? Is it some database issue? Hacking or something?</p>
  
  <p>When I searched over Internet, I found that <code>200D</code> is an ASCII value with an <strong>invisible</strong> character. Is it true? </p>