Is var str: String mutable or immutable? : <p>I have declared a String variable in Kotlin as like.</p>

<p><code>var str: String</code></p>

<p>The Kotlin document contradict for mutability concept.
As per document...
var is mutable.
<img src="https://i.stack.imgur.com/jRttP.png" alt="var is mutable"></p>

<p>But for String it define as immutable.
<img src="https://i.stack.imgur.com/W6ssW.png" alt="String is immutable"></p>

<p>So please clarify contradiction...</p>
