lovecoding
/
VIP20


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<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>Document</title>
</head>

<body>
  <script>
    // var person = {
    //   name: 'zs',
    //   age: 18,
    //   school: {
    //     num: 10000,
    //     name: 'qinghua'
    //   }
    // }
    // console.log(person.age)

    var computer = new Object();
    //对象.属性名 = 属性值
    computer.cpu = 'i9-13'
    computer.xianka = '4090'
    computer.neicun = 'sanxing16G'
    console.log(computer)

    var person = new Array();
    person[0] = 18;
    person[1] = "123kg";
    person[2] = "170cm";
    person[3] = 2;
    
    console.log(person)

    console.log(typeof computer) //数组还是对象 数据类型都是object
    console.log(typeof person)

    var x = new String();        // 把 x 声明为 String 对象
    var y = new Number();        // 把 y 声明为 Number 对象
    var z = new Boolean();       //	把 z 声明为 Boolean 对象
    x = '123'
    // 请避免字符串、数值或逻辑对象。他们会增加代码的复杂性并降低执行速度
  </script>
</body>

</html>