Understanding Angular 8 Event emitters

How communicate my components?

I've been working with Angular 8, as a my common habit I start new projects with technologies I wanna to learn and during design and implementation workflow I use learn and now a day I desire share here stuff from my daily challenges, today I about how I comunicate child components with parent one in my Angular APP and after few researchig hours between read Angular's documentation and research for post with similar content I found that

https://www.intertech.com/Blog/angular-component-tutorial-inputs-outputs-and-eventemitters/

I reallly undestood clearly how @Input, @Output and EventEmitter flows throw the Angular environment and I can fix things with it.