class Solution {
public:
    double Power(double base, int exponent) {
        double ans = 1;
        if(exponent == 0){
            return ans;
        }else if(exponent > 0){
            for(int i = 0; i < exponent; i++){
                ans *= base;
            }
            return ans;
        }else{
            for(int i = 0; i < -exponent; i++){
                ans *= base;
            }
            return 1 / ans;
        }
    }
};