find the Power without loop or recursive call-CodePudding

Hi Stack overflow community recently came across this question.. where the interviewer asked me to find the power of the given number without any loop or recursive call no inbuilt.

Example :2^3 = 8 , 3 ^ 3 = 27

please let me know if there is a ans :)

My approach was

int val = 2;
int pow = 3;
while (pow != 0)
{
result *= val;
--pow;
}

CodePudding user response：

The cleanest way is using package java.lang.Math

Always remember:

"If already exist, don't create it"

double val = 2;
double pow = 3;

System.out.println(Math.pow(val, pow));

Math have some many other uses, like Pi number, trigonometry, random numbers... Check it out here

CodePudding user response：

You can use recursive method. An example code is:

public static void main(String[] args) {
    System.out.println(power(3,3));
    System.out.println(power(2,3));
}

public static int power(int value, int pow){
    
    if(pow > 1){
        return value * power(value, pow - 1);
    }
    
    return value;
}