数值的整数次方

题目描述
给定一个double类型的浮点数base和int类型的整数exponent。求base的exponent次方。

python solution:

# -*- coding:utf-8 -*-
class Solution:
    def Power(self, base, exponent):
        if exponent==0:
            return 1
        if exponent==1:
            return base
        flag = False
        if exponent>1:
            flag = True
        exponent = abs(exponent)
        res = base
        while exponent>1:
            res *= base
            exponent -= 1
        if flag:
            return res
        else:
            return 1/res