index.html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My JavaScript</title>
</head>
<body>
<script src="main.js"></script>
</body>
</html>main.js
'use strict';
{
const scores = [70, 90, 80, 85];
// const first = scores[0];
// const second = scores[1];
// const third = scores[2];
// const fourth = scores[3];
const [first, second, third, fourth] = scores;
console.log(first);
console.log(second);
console.log(third);
console.log(fourth);
}