let stu = {
    
    name:"张三",age:18}
// 获取name值
let name = stu.name;

let stu = {
    
    name:"张三",age:18}
// 获取name值
let name = stu["name"];

let stu = {
    
    name:"张三",age:18}
for(let i in stu){
    
    
	// 获取参数
	let param = i;
	// 获取值
	let paramValue = stu[i];
}