title: Turn Positive into negative?
body: <p>I've got this code</p>
  
  <pre><code>public class FiboNegativV {
      int negativ(int nv) {
          if (nv ==0)
          return 1;
  
          if (nv ==1)
          return 2;
  
          return negativ(nv-1) + negativ(nv-2); 
     }
  }
  </code></pre>
  
  <p>Now I would like to turn the final number into negative. I've tried a few things like "nv = -nv;" But I usually got stackover when I put it before the 
  "return negativ(nv-1) + negativ(nv-2)" and it is unreachable when it's after this line.</p>