title: swift difference between final var and non-final var | final let and non-final let
body: <p>What's difference between final variables and non-final variables :</p>
  
  <pre><code>var someVar = 5
  final var someFinalVar = 5
  </code></pre>
  
  <p>and</p>
  
  <pre><code>let someLet = 5
  final let someFinalLet = 5
  </code></pre>