CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

I just posted this to a gist: https://gist.github.com/2228570 var out = ''; function doWhat(){ out += '<li>'; console.log(out === '<li>'); // at this point, out will equal '<li>' return ''; } out += doWhat(); console.log(out, out === '<li>'); // I expect out to == '<li>', but it's actually an empty string!?