title: Indenting with white spaces, tabs, and how many spaces or the tab width
body: <p>I know that this is more of a coding style, instead of a one right way of doing things. But, I'm a bit frustrated if I came across different indenting formats. </p>
  
  <p>But, I would like to hear the reasons by various people on these issues:</p>
  
  <ul>
  <li>Do you use spaces or tabs? Tabs with spaces? Any difference with "Tab insert space", instead of using the space key directly?</li>
  <li>How many spaces to indent each line of code? Why?</li>
  <li>Does different code has different style that is more suitable for each of them?</li>
  </ul>
  
  <p>Is there a way to "visually" indent code without actually writing the indent? So it won't ruin the original indenting? It seems unlikely.</p>
  
  <p>I'm using Xcode, so it's better if you have advice for Xcode projects.</p>