qw
/
soilgd


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
//字符串类型 string
//定义 字符串类型用干存储字符序列
//代码
//let name="邓瑞"//姓名为邓瑞
//let web="dengruicode.com"//网址为 dengruicode.com
//数值类型 number
//定义 用干存储数字,可以表示整数、浮点数
//代码
//letbalance=-100 //账户余额为-100元let weight=60.5 //体重为60.5公斤
//布尔类型 boolean
//定义 布尔类型只能取两个值,true(真) 和 false(假)代码
//let tv=true //电视-true(开)
//对象 object
//定义 对象是一种复合的数据类型,可以通过键值对的方式存储多个值代码
//定义了一个包含姓名、年龄和体重的对象let boy ={
//name: "David",age: 28,
//weight: 70.5
//console.log("boy", boy)

        //布尔类型
        let tv = true
        console.log("tv", tv);
        console.log(typeof tv);
        
        //对象
        let boy = {
            name: "as",
            age:"21",
            weight: 60.3
        }
        console.log("boy", boy)
        console.log(typeof boy);
        
        //map
        let girl = new Map([
                ["name","Luna"],
                ["age",14]
        ])
        console.log("girl", girl)
        console.log(typeof girl);

        //set,数据不重复
        let number = new Set([1,2,3,4,2,"2"])
        console.log("number", number)
        console.log(typeof number);

        //数组
        let arr = ["q", "w", "e"]
        console.log("arr", arr)
        console.log(typeof arr);

        //函数
        function add(x,y) {
            console.log(x + y)
        }
        add(20,30)

        //类
        class person {
            name
            age
            constructor(username, userage) {
                this.name = username
                this.age = userage
            }
            info (){
                console.log("name",this.name, "age", this.age);
            }
        }
        let person = new person("qw", 12)
        person.info
        
    </script>
</body>
</html>