The ability for one interface to work with many types.
Polymorphism lets code operate on values of different types through a common interface. In OOP it often means subclasses override methods of a base type, so a single call dispatches to the correct implementation at runtime.
Bundling data with the methods that operate on it.
BooleanA data type with two possible values: true or false.
FrameworkA reusable foundation that structures how you build software.
ClassA blueprint for creating objects in OOP.
LoopA control structure that repeats a block of code.
ClosureA function bundled with references to its surrounding scope.