title: Trying to initialize a function by adding two numbers then transforming the sum into a binary string, what's missing?
body: <pre><code>function addBinary(a,b) {
    var sum = a + b;
    return sum;
  
    function decToBin(sum) {
      return (sum &gt;&gt;&gt; 0).toString(2);
    }
  }
  </code></pre>