Arrow Function Expression:
all means same thing –
Example One
const Header = () => ( return ( <h1>scoreboard</h1> <span className="stats">Players: 1</span> </header> );}
Simplified
const Header = () => (<h1>scoreboard</h1><span className="stats">Players: 1</span></header>);
Further simplified
const Header = () => <h1>scoreboard</h1><span className="stats">Players: 1</span></header>