useState() vs. setState()

Does useState() store state differently than setState()? How are state variables being stored when you call useState() multiple times? In one state object like for setState(), or another way?

Can’t find anything online about this.

useState()

React components can receive dynamic information from props, or set their dynamic data with state. Props are passed down by parents components, whereas state is created and maintained by the component itself. You can use this.state() in constructor method and use it in render(), and then updated with this.setState().

this.setState()

React class components can change their state with this.setState(). this.setState() should always be used instead of directly modifying the this.state object. this.setState() takes an object which it merges with the component’s current state.