Indentifiers

An identifier is a user defined name that can be used for user-created variables or functions, there are specific syntax rules for identifier names:

• identifiers can only contain: letters, numbers, the underscore character _ or the dollar $ character.

• identifiers must start with a letter, an underscore, or dollar-sign (not with a number)

• identifiers cannot contain white-space or blank spaces

• javascript is case-sensitive: myValue and Myvalue are not equivalent