const [number, setNumber] = useState(0); const increase = () => { setNumber(number + 1); }; const decrease = () => { setNumber(number - 1); }; useEffect(() => { console.log("hello number - " + number); }, [number]); return ( <div> Hello World {number} <button onClick={increase}>Increase Number</button> <button onClick={decrease}>Decrease Number</button> </div> );