Day 9: Recursion 3 Hackerrank Solution in java For Explanation: Sample Input 3 Sample Output 6 Code: import java.io.*; import java.math.*; import java.security.*; import java.text.*; import java.util.*; import java.util.concurrent.*; import java.util.regex.*; public class Solution { // Complete the factorial function below. static int factorial( int n) { if (n<= 1 ){ return 1 ; } else { return n*factorial(n- 1 ); } } private static final Scanner scann...