{
//     重点是要理解到第n级台阶的跳法等于第n-1阶跳法与第n-2阶跳法之和
    if(number === 1) return 1
    else if(number === 2) return 2
    else return jumpFloor(number - 1) + jumpFloor(number - 2)
}
module.exports = {
    jumpFloor : jumpFloor
};