State of a component is an object that holds some information that may change over the lifetime of the component.

class Message extends React.Component {
  constructor(props) {
    super(props)
	
    this.state = {
      message: 'Welcome to React js Interview Questions.'
    }
  }

  render() {
    return (
      

        
{this.state.message}
      
    )
  }
}