How do I exit top command?

I lost knowledge of CentOS 7 Linux. I went to work with Windows but now need to work again. I start top command to see information. How do I exit top command? I am pressing ctrl d but it is not working at all.

  1. Type top to start it:
    top
  2. Press q (small letter q) to quit or exit from top session.
    q
  3. To display help just press ? or h within top session
    ?
  4. Read man page by tying:
    man top

See