Caesars Cipher: Correct Values are shown in console.log but still i cannot pass

Challenge Caesars Cipher has an issue. User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36. Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:

function rot13(str) { // LBH QVQ VG!
var res="";	
  for(var i=0;i<=str.length;i++){
  	if((str.charCodeAt(i)==32)||(str.charCodeAt(i)<=64))
  		delta=str.charCodeAt(i);
  	else if((str.charCodeAt(i))>77)
  		delta=str.charCodeAt(i)-13;
  	else 
  		delta=str.charCodeAt(i)+13;
  	res+=String.fromCharCode(delta);
  }
  return res;
}

// Change the inputs below to test
//rot13("SERR");
console.log(rot13("SERR PBQR PNZC"));
console.log(rot13("SERR CVMMN!"));
console.log(rot13("SERR YBIR?"));
console.log(rot13("GUR DHVPX OEBJA QBT WHZCRQ BIRE GUR YNML SBK."));

I made a test in my browser, and it delivers all the correct values, but still i don’t pass.

[rawgni]

for(var i=0;i<=str.length;i++){ should be i < str.length

Your result might look correct, but they actually have a \x0 at the end.

[Bouncey]

What @rawgni said.

@hanhoah please ensure you have asked for help, or that someone could confirm the issue in the Help chatrooms before posting an issue on github. You can access the correct chat room for your challenge by clicking on the Help button in the side panel.

Closing as coding error.