Counting numbers up and down using Recursion

Question

Given two numbers, let\'s say start = 1 and end = 4, I am trying to count all the numbers in sequence up and then down . No looping is allowed

Answer 1

try this

 private static int  CountUpAndDown(int end, int first, int start)
    {
        if(end==first)
        {
            return -1;
        }
        if (start > end)
        {
           System.out.println(--end);
        }
        else {
            System.out.println(start++);
        }
        return CountUpAndDown(end, first, start);
    }