title: Object is used to send a message or receive a message?
body: <p>I am using <strong>Objective-C</strong>, I have a doubt in message passing terminology. In this line of code</p>
  
  <pre><code>[obj dosomething];
  </code></pre>
  
  <p>Whether Object <code>obj</code> is sending a message <code>dosomething</code>, or receiving a message?
  If it sending a message then I want to know, what it exactly means? What could be happened in heap memory?</p>
  
  <p>Thank you </p>