HACKERRANK JAVA SOLUTIONS

QUESTION:

You must save a line of input from 'stdin' to a variable, print Hello, World. on a single line, and finally print the value of your variable on a second line.

          Note: The instructions are Java-based, but we support submissions in many popular languages.You can switch languages using the drop-down menu above your editor, and the input string variable may be written differently depending on the best-practice conventions of your submission language

        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) {

        // Create a Scanner object to read input from stdin.

        Scanner scan = new Scanner(System.in); 

        

        // Read a full line of input from stdin and save it to our variable, inputString.

        String inputString = scan.nextLine(); 

        // Close the scanner object, because we've finished reading 

        // all of the input from stdin needed for this challenge.

        scan.close(); 

      

        // Print a string literal saying "Hello, World." to stdout.

        System.out.println("Hello, World.");

      

        // TODO: Write a line of code here that prints the contents of inputString to stdout.

    }

}QUESTION

 The variables i, d, and s are already declared and initialized for you. You must:

      Declare 3 variables: one of type int, one of type double, and one of type String.

       Read 3 lines of input from stdin(according to the sequence given in the Input Format section         below) and initialize your 3 variables.

        Use the + operator to perform the following operations:

                        * Print the sum of i plus your int variable on a new line.

                        * Print the sum of d plus your double variables to a scale of one decimal place on a                             new line.

                        * Concatenate s with the string you read as input and print the result on a new line.

        Note:  If you are using a language that doesn't support using + for string concatenation (e.g.:C), you can just print one variable immediately following the other on the same line. The string provided in your editor must be printed first, immediately followed by the string you read as input.

Input Format

The first line contains an integer that you must sum with i.
The second line contains a double that you must sum with d .
The third line contains a string that you must concatenate with s .

Output Format

 Print the sum of both integers on the first line, the sum of both doubles (scaled to 1 decimal place) on the second line, and then the two concatenated strings on the third line.

 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);

        /* Declare second integer, double, and String variables. */

        int a = scan.nextInt();;

        double b = scan.nextDouble();

        scan.nextLine();

        String c = scan.nextLine();

        /* Read and save an integer, double, and String to your variables.*/

        // 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. */

        int sumofi = i+a;

        System.out.println(sumofi);

        /* Print the sum of the double variables on a new line. */

        double sumofd = d+b;

        System.out.println(sumofd);

        /* Concatenate and print the String variables on a new line; 

            the 's' variable above should be printed first. */

        System.out.println(s+c)   ; 

        scan.close();

    }

}