# Behavioral Design Patterns

- [Chain Of Responsibility](/notebook/design-patterns/behavioral-design-patterns/chain-of-responsibility.md)
- [Command Design Pattern](/notebook/design-patterns/behavioral-design-patterns/command-design-pattern.md)
- [Interpreter Design Pattern](/notebook/design-patterns/behavioral-design-patterns/interpreter-design-pattern.md)
- [Iterator Design Pattern](/notebook/design-patterns/behavioral-design-patterns/iterator-design-pattern.md)
- [Mediator Design Pattern](/notebook/design-patterns/behavioral-design-patterns/mediator-design-pattern.md)
- [Memento Design Pattern](/notebook/design-patterns/behavioral-design-patterns/memento-design-pattern.md)
- [Null Object Design Pattern](/notebook/design-patterns/behavioral-design-patterns/null-object-design-pattern.md)
- [Observer Design Pattern](/notebook/design-patterns/behavioral-design-patterns/observer-design-pattern.md): Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
- [State Design Pattern](/notebook/design-patterns/behavioral-design-patterns/state-design-pattern.md)
- [Strategy Design Pattern](/notebook/design-patterns/behavioral-design-patterns/strategy-design-pattern.md): lets the algorithm vary independently from clients that use it
- [Template Design Pattern](/notebook/design-patterns/behavioral-design-patterns/template-design-pattern.md)