Flutter for Beginners

The enum type

The enum type is a common type used by most languages to represent a set of finite constant values. In Dart, it is no different. By using the enum keyword, followed by the constant values, you can define an enum type:

enum PersonType {  student, employee}

Note that you define just the value names. enum types are special types with a set of finite values that have an index property representing its value. Now, let's see how it works.

First, we add a field to our previously defined Person class to store its type:

class Person {  ...  PersonType type;  ...}

Then, we can use it just like any other field:

main() {  print(PersonType.values); // prints [PersonType.student,                                            //PersonType.employee]   Person somePerson = new Person(); somePerson.type ...