视频
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>const 定义常量</title>
</head>
<body>
<script>
//声明常量
const SCHOOL = '尚硅谷';
//1. 一定要赋初始值
// const A;
//2. 一般常量使用大写(潜规则)
// const a = 100;
//3. 常量的值不能修改
// SCHOOL = 'ATGUIGU';
//4. 块儿级作用域
// {
// const PLAYER = 'UZI';
// }
// console.log(PLAYER);
//5. 对于数组和对象的元素修改, 不算做对常量的修改, 不会报错
const TEAM = ['UZI','MXLG','Ming','Letme'];
// TEAM.push('Meiko');
</script>
</body>
</html>