Sequence diagrams

This video is super good: https://www.youtube.com/watch?v=pCK6prSq8aw

A sequence diagram shows how objects in a system or classes interact with each other.

They show the sequence of events

Lifelines

Shows the actors over time. Moving down the line means that more time has passed.

Exercises

Exercise 1

Explain and write down with your own words what this sequence diagram does.

diagram

Exercise 2

Take a previous project you made and make at least two sequence diagrams.