title: I'm using let keyword in for loop gives SyntaxError: Unexpected identifier
body: <p>I'm using let keyword in for loop as following</p>
  
  <pre><code>for(let methd1 in servUrl){
      let methd=methd1;
      for(let pth1 in servUrl[methd]) {
          let pth=pth1;
          app[methd](pth, servUrl[methd][pth]);
      }
  }
  </code></pre>
  
  <p>which gives me following error</p>
  
  <pre><code>for(let methd1 in servUrl){
          ^^^^^^
  SyntaxError: Unexpected identifier
  </code></pre>