FIT100
Variables
•Names in programming are identifiers
•The things they name are their values
The package -- identifier & value -- is a variable, implying a possible change
•Identifiers have a specific structure in every programming language
•JS: letters, digits, _  start with letter, case sen.
X   x   textOut   MI5   long_variables_are_OK  rate
hypens-not-OK  007   no spaces    end