Day 1: Data Types Hackerrank Solution Do Check My Explanation Video On Following Code: Sample Input 12 4.0 is the best place to learn and practice coding! Sample Output 16 8.0 HackerRank is the best place to learn and practice coding! Code: import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { int i = 4 ; double d = 4.0 ; String s = "HackerRank " ; Scanner scan = new Scanner(System.in); ...