E8.13

public class Numeric {


    public static double intPower(double x, int n){
        double answer;

        if(n > 0 && n % 2 != 0){
            double intermediate;
            intermediate = Math.pow(x, n-1);
            answer = intermediate * x;
        }

        if(n < 0){
            answer = 1 / (Math.pow(x, n));
        }

        if(n > 0 && n % 2 == 0){
            double mediator;
            mediator = Math.pow(x, n / 2);
            answer = Math.pow(mediator, 2);
        }

        return answer;
    }

}