title: Remove leading digit from integer
body: <p>I have an integer value, for example <code>-12345678</code>, and I want to remove
  the leading digit, so that the result is <code>-2345678</code>.</p>
  
  <p>One could convert it to string and remove 1 character, then remove 1 symbol.</p>
  
  <p>Is there any simple way to achieve that?</p>