--description--

There are two limitations on variable names in JavaScript:

1. The name must contain only letters, digits, or the symbols $ and _.
2. The first character must not be a digit.

Examples of valid names:

let userName;
let test123;

What’s interesting – the dollar sign '$' and the underscore '_' can also be used in names. They are regular symbols, just like letters, without any special meaning.

These names are valid:

let $ = 1; // declared a variable with the name "$"
let _ = 2; // and now a variable with the name "_"

console.log($ + _); // 3

Examples of incorrect variable names:

let 1a; // cannot start with a digit

let my-name; // hyphens '-' aren't allowed in the name

--questions--

--text--

Which of the following is a valid JavaScript variable name?

--answers--

let 2things;

let my-name;

let var!;

let $myVar;

--video-solution--

4