title: Difference Between Completion Handler and Blocks : [iOS]
body: <p>I am messed with both completion handler and blocks while I am using them in <code>Swift</code> and <code>Objective-C</code>. And when I am searching blocks in <code>Swift</code> on google it is showing result for completion handler! Can somebody tell me what is the difference between completion handler and blocks with respect to <code>Swift</code> and <code>Objective-C</code> ?</p>