如何反转数组的元素？

let arr = [1, 2, 3, 4, 5];
arr.reverse();
console.log(arr); // 输出: [5, 4, 3, 2, 1]

function reverseArray(arr) {
    let start = 0;
    let end = arr.length - 1;
    while (start < end) {
        // 交换元素
        let temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start++;
        end--;
    }
    return arr;
}

let arr = [1, 2, 3, 4, 5];
console.log(reverseArray(arr)); // 输出: [5, 4, 3, 2, 1]

arr = [1, 2, 3, 4, 5]
arr.reverse()
print(arr)  # 输出: [5, 4, 3, 2, 1]

# 或者使用切片
arr = [1, 2, 3, 4, 5]
reversed_arr = arr[::-1]
print(reversed_arr)  # 输出: [5, 4, 3, 2, 1]