在typescript中有没有办法说“还有其他的”

function addNumbers(num1: number, num2: number, num3?: number) {
  let result = num1 + num2;
  if (num3 !== undefined) {
    result += num3;
  }
  return result;
}

console.log(addNumbers(5, 10));         // 输出：15
console.log(addNumbers(5, 10, 20));     // 输出：35

function sum(...numbers: number[]) {
  let result = 0;
  for (let num of numbers) {
    result += num;
  }
  return result;
}

console.log(sum(1, 2, 3, 4, 5));        // 输出：15
console.log(sum(10, 20, 30));           // 输出：60