how to define all state in react in render code example

Example 1: setstate react js

constructor(props) {
        super(props);
        this.state = {
            isActive: true,
        };
    }

    checkStatus = () => {
        this.setState({		// use this function
            'isActive' : !this.state.isActive,
        });
    }

Example 2: reading state react

const Example = (props) => {
  // You can use Hooks here!
  return <div />;
}