编辑代码

func getSum(number: Int) -> Int {
    func getNum(num: Int) -> Int {
        var sum = 1
        for i in 1...num {
            sum *= i
        }
        return sum
    }
    var total = 0
    for item in 1...number {
        total += getNum(num: item)
    }
    return total
}
print(getSum(number: 3))