power

public class app {
    public static void main(String[] args) {
        var result = power(10,10);
        System.out.println(result);
    }

    public static int power(int base, int exp) {
        if(exp<0){
           return -1;
        }
        if(exp==0||exp==1){
            return base;
        }

        return base * power(base, exp - 1);
    }

}