title: How to get length of a nsstring in nsstring that is always 2 digits long?
body: <p>I am taking the length of a nsstring and converting it to nsstring. I need this last string  always 2 digits long, so for example word "hello"'s length in string would be "05" and not "5".</p>
  
  <p>My code so far:</p>
  
  <pre><code>NSString *sth=@"hello";
  NSMutableString *result=[NSString stringWithFormat:@"%d", sth.length]; //string is "5" and not "05" that i need
  </code></pre>