Data Types Challenge

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);
        
          /* Declare second integer, double, and String variables. */
        int i2;
        double d2;
        String s2;
        /* Read and save an integer, double, and String to your variables.*/
        i2 = scan.nextInt();
        d2 = scan.nextDouble();
        scan.nextLine(); // read the rest of the line of input (newline character after the double token).
        s2 = scan.nextLine();
        // Note: If you have trouble reading the entire String, please go back and review the Tutorial closely.
        
          /* Print the sum of both integer variables on a new line. */
                System.out.println(i + i2);


        /* Print the sum of the double variables on a new line. */
                System.out.println(d + d2);

		
        /* Concatenate and print the String variables on a new line; 
        	the 's' variable above should be printed first. */
                    System.out.println(s + s2);

            

        scan.close();
    }
}