在js中定义函数可以使用几个参数

function greet() {  console.log("Hello!");}

function greet(name) {  console.log("Hello, " + name + "!");}

function calculateArea(length, width) {  return length * width;}

function sum(...numbers) {  let total = 0;  for (const num of numbers) {    total += num;  }  return total;}

function greet(name = "John") {  console.log("Hello, " + name + "!");}