JavaScript Variable Name Rules

In JavaScript, variable names must adhere to the following rules:

1. Variable names must begin with a letter, an underscore (_), or a dollar sign ($).
2. After the first character, variable names may also contain digits (0-9).
3. Variable names are case sensitive. For example, myVariable and MyVariable are two distinct variable names.
4. Variable names cannot be a reserved keyword. For example, var, function, and return are all reserved keywords and cannot be used as variable names.
5. Variable names should be descriptive and meaningful, making it easy for other developers to understand what the variable is used for.