Variable Declaration

          Variable names in JavaScript are often referred to as identifiers. Identifiers are a sequence of characters in a program that identifies a variable, function, or property.

          Some key things to note about variables: 

• Letters, numbers, a dollar sign ($), and an underscore (_) can be used for a variable name, but it cannot start or begin with a number. 
• Any word on a list of reserved keywords as shown through this link https:// www.w3schools.com/js/js_reserved.asp, cannot be a variable 
• It is case sensitive.
• The naming convention is camelCase, where a variable always starts in lowercase, but a capitalized letter begins with each subsequent word.