A named container that stores a value in a program.
A variable associates a name with a storage location holding a value that can be read and (usually) changed during execution. Variables have a type and a scope that determines where they are accessible.
A control structure that repeats a block of code.
ClosureA function bundled with references to its surrounding scope.
PolymorphismThe ability for one interface to work with many types.
BooleanA data type with two possible values: true or false.
FunctionA reusable, named block of code that performs a task.
EncapsulationBundling data with the methods that operate on it.