Basic Java Recursion Method

Question

I am having a lot of trouble with this basic recursion problem in java; any pointers would be great.

\"Write a static recursive method to print out th

Answer 1

A recursive solution: Seq(1) is the first element of the sequence .... Seq(n-th)

public static void main(String args[]) throws Exception {
    int x = Seq(3); //x-> 18
}

public static int Seq(int n){
    return SeqRec(n);
}

private static int SeqRec(int n){
    if(n == 1)
        return 2;
    else return SeqRec(n - 1) * 3;
}

Non-Recursive solution:

public static int Non_RecSeq(int n){
    int res = 2;

    for(int i = 1; i < n; i ++)
        res *= 3;

    return res;
}

public static void main(String args[]) throws Exception {
    int x = Non_RecSeq(3); //x-> 18
}