js函数参数列表

function greet(name = 'World') {
  console.log(`Hello, ${name}!`);
}

greet(); // 输出: Hello, World!
greet('Alice'); // 输出: Hello, Alice!

function sum(...numbers) {
  return numbers.reduce((total, num) => total + num, 0);
}

console.log(sum(1, 2, 3)); // 输出: 6
console.log(sum(1, 2, 3, 4, 5)); // 输出: 15

function printUser({ name, age }) {
  console.log(`Name: ${name}, Age: ${age}`);
}

const user = { name: 'Alice', age: 25 };
printUser(user); // 输出: Name: Alice, Age: 25

function add(a, b) {
  if (typeof a !== 'number' || typeof b !== 'number') {
    throw new TypeError('Both arguments must be numbers');
  }
  return a + b;
}

try {
  console.log(add(1, '2')); // 抛出错误: Both arguments must be numbers
} catch (error) {
  console.error(error.message);
}