i have quesetions in a Usestate demo

import "./styles.css";
import { useRef, useState } from "react";
export default function App() {
  const [count, setCount] = useState(0);
  const ref = useRef(null);
  const handleClick = () => {
    setCount(count + 1);
    setCount((pre) => pre + 1);
  };
  return (
    <div className="App">
      <button onClick={handleClick}>+</button>
      <h1>{count}</h1>
      <h2>Start editing to see some magic happen!</h2>
    </div>
  );
}

const handleClick = () => {
   setCount((pre) => pre + 1);
   setCount(count + 1);

};