title: swift how to convert Decimal type to String type
body: <p>How to convert <code>Decimal</code> to <code>String</code> in swift?</p>
  
  <p>For example</p>
  
  <pre><code>let de = Decimal(string: "123")
  </code></pre>
  
  <p>then how to convert <code>de</code> to String.</p>