title: In C and Objective-C, should we use 0.5f or 0.5?
body: <p>There are many places that I saw an author uses:</p>
  
  <pre><code>sprite.anchorPoint = CGPointMake(1, 0.5f);
  </code></pre>
  
  <p>that is, why not use <code>0.5</code> instead of <code>0.5f</code> -- is there advantage of using <code>0.5f</code>?</p>