An application that responds to user input is valuable, but what do we do with that data the user has given us? This is where component state comes in. We need a place to put data that can change in our application, and we need to let React know when that state changes so it can update (or re-render) our app for us.
In React, state is associated to components and when the state changes, the component is updated. To get access to this state and to update it, we use what is called a “React Hook” which allows us to call into React from within our component and let it know that we need to manage some state. In this lesson, you’ll learn how to use the
useState hook to do this.