Declare & Assign values to variables in JavaScript

There are rules and conventions in naming variables in any programming 
language. It is good practice to use descriptive names for variables.

* You can't use space to separate characters. 
    userName not user Name

*Capitalize the first letter of every word except the first 
salesTax or userFirstName 

To assign values to variables, add an equal sign and the value:
var userName = "Smith" 
var price = 100