Question

I tried to make an alert popup with “A” with:

var a = \u0041;
alert(a);​

jsfiddle

However, I get an error in Chrome Console: Uncaught ReferenceError: A is not defined.

What does that mean? I don’t have a variable called A anywhere.

Answer 1

\u0041 is the unicode for capital letter A. The interpreter translates it as is, not assuming that it is a string.

To alert the value rather than looking for a variable with that name, do alert("\u0041")

Following your code style, the modified code would look like this:

var a = "\u0041";
alert(a);