What is the use of @Input and @Output?

What is the use of @Input and @Output? 

When it comes to the communication of Angular Components, which are in Parent-Child Relationship; 

we use @Input in Child Component when we are passing data from Parent to Child Component and @Output is used in Parent Component to receive an event from Child to Parent Component. 

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About Mariano

I'm Ethan Mariano a software engineer by profession and reader/writter by passion.I have good understanding and knowledge of AngularJS, Database, javascript, web development, digital marketing and exploring other technologies related to Software development.