title: How to manually send a message to a process which I just spawned?
body: <p>How can I send a message to process with Erlang? I did start a process and the output shows me that the pid (process identifier) is <code>&lt;0.39.0&gt;</code>.
  My question is how can I send a message to this process (<code>&lt;0.39.0&gt;</code>) manually.</p>