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