title: C++11 to_string() function, where?
body: <p>See the <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3242.pdf" rel="noreferrer">N3242 Working Draft of C++11</a>, chapter 21.5 Numeric Conversions.</p>
  
  <p>There are some useful functions, such as <code>string to_string(int val);</code> mentioned but I don't understand how they're called. Can anyone give me an example please?</p>