Example
A type to name a set of numeric values:
Number values default to 0:
enum Day { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday };
let bestDay: Day = Day.Saturday;
Set a default starting number:
enum TenPlus { Ten = 10, Eleven, Twelve }
or assign values:
enum MyOddSet { Three = 3, Five = 5, Seven = 7, Nine = 9 }
