invalid character in identifier
Your text has some characters that the editor does not show.  Using an online UTF-8 encoder, you can see that the end of the line has:

\x29\xef\xbb\xbf\x0a


When it should simply be a close paren and a new line like:

\x29\x0a


You need to delete the offended characters.  Best way to handle these situations, is to select an area of the text on either side of the compiler complaint and delete it all as a block and then retype the text.

After the cleanup your code produces:

[1]


PS: That error output is called a stack trace, and it was exactly right, there was an invalid character present at the location indicated.