用箭头比较列表长度

const list1 = [1, 2, 3, 4, 5];
const list2 = [6, 7, 8, 9];

const compareListLengths = (listA, listB) => {
  if (listA.length > listB.length) {
    return "List A is longer";
  } else if (listA.length< listB.length) {
    return "List B is longer";
  } else {
    return "Both lists have the same length";
  }
};

console.log(compareListLengths(list1, list2)); // Output: "List A is longer"