keywords in dart are reserved words that are defined by language and have a special meaning defined by the compiler.

They can not be used as variables and method names.

The following are keywords.

  • Abstract modifier
  • assert
  • as
  • async and await
  • break
  • case
  • const
  • final
  • new
  • with
  • get
  • set
  • library
  • package
  • required
  • return
  • patch
  • export
  • finally
  • on
  • interface
  • where
  • yield
  • const
  • external
  • is
  • var
  • implements

interface keyword

Interface is one of important concept of OOP concepts.

It defines an abstract way of doing and a blueprint for the class of objects.

You can define implicit and explicit interfaces.

class Animal{
// Allows methods with body
// does not allow method declaration
}

class Lio implements Animal{
  // provide the implementation for all methods in interface
}