title: What is the difference between `size` and `length` methods
body: <p>When I ran <code>size</code> and <code>length</code> on a string, they returned the same value.</p>
  
  <pre><code>"akash".size # =&gt; 5
  "akash".length # =&gt; 5
  </code></pre>
  
  <p>What is the difference between these two methods?</p>