标签：ES6 console log 作用域 let 声明 变量
视频
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>let</title>
</head>
<body>
<script>
//声明变量
let a;
let b,c,d;
let e = 100;
let f = 521, g = 'iloveyou', h = [];
//1. 变量不能重复声明
// let star = '罗志祥';
// let star = '小猪';
//2. 块儿级作用域 全局, 函数, eval
// if else while for
// {
// let girl = '周扬青';
// }
// console.log(girl);
//3. 不存在变量提升
// console.log(song);
// let song = '恋爱达人';
//4. 不影响作用域链
{
let school = '尚硅谷';
function fn(){
console.log(school);
}
fn();
}
</script>
</body>
</html>
标签：ES6,
console,
log,
作用域,
let,
声明,
变量
From： https://www.cnblogs.com/chuixulvcao/p/17149438.html