I have a question about React Lifecycle.

import React from 'react';

function App() {

  const [count, setCount] = React.useState(0);

  const handler = () => setCount(count+1);

  React.useEffect(() => {
    console.log ("Rendering Complete")
  }, []);

  console.log(123123);

  return (
    <div className="App">
      {count}
      <button onClick={handler}>+</button>
    </div>
  );
}

export default App;

123123
123123
Rendering complete