1.4.2.1 参数问题
const sum = (num1,num2) => { return num1 + num2 }
const power = num => { return num * num }
1.4.2.2 函数内部
const test = () =>{ console.log("hello zzz") console.log("hello vue") }
// const mul = (num1,num2) => { // return num1 * num2 // } const mul = (num1,num2) => num1* num2 // const log = () => { // console.log("log") // } const log = () => console.log("log")