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天蓬老师批改状态：合格
老师批语：
<!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>function getName(name){return "Welconme to" + name;}//调用console.log(getName('朱老师'));//重写function getName(name,city){return "欢迎来自"+city+"的"+name;}console.log(getName("谢老师","都匀"))console.log(sum(600,800));function sum(a=4,b){return a +b;}console.log(sum(300));//归并参数。restsum =function (... arr){// console.log(arr);// let res =0;// for(let i=0; i<arr.length;i++){// res += arr[i];// }// return res;}let a1 =[1,2,3,4,5,6,7];//console.log(sum(1,2,3,4,5,6,7));//console.log(sum(a1));console.log(sum(...a1));function getProduct(){return [123,"手机",654987,"HUAWEI"];}let mobile=getProduct();console.log(mobile);console.log(mobile[3]);function getProduct(){return {id:123,name:"手机","my price":654987,brand:"HUAWEI"};}console.log(mobile["my price"]);sum =(a,b) => {return a +b;};console.log(sum(10,20));/*let getName=function(name){return "hello" +name;}*/getName=name =>{return "Hello3"+ name;}console.log(getName("老猪"));//单一函数 可以省略sum=(a,b)=>a+b;console.log(sum(80,50));//声明function sun(a,b){return a+b;};//调用console.log(sum(50,60));//简化声明 用圆括号包住，使之转为表达式(function sum(a,b){console.log(a+b);})(40,20);</script></body></html>
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