uncaught syntaxerror unexpected identifier error in Javascript or Jquery

uncaught syntaxerror unexpected identifier error in Javascript or Jquery

"Uncaught SyntaxError: Unexpected identifier", the Javascript/Jquery error is often encountered, this time the use of Chrome Google browser debug JS to appear again this exception, not too much care before, so when writing JavaScript code is always the problem.

But it's easy to solve this problem, for example, this error code:

1. <script type="text/javascript">
2. var str = Hello World;
3. </script

STR is a string type, but no "" symbol, so there is "Uncaught SyntaxError: Unexpected identifier" error.
change the above code, as follows:

1. <script type="text/javascript">
2. var str = "Hello World";
3. </script

ok, thanks!