Hackerrank Day 0: Hello, World 30 days of code solution

HackerRank Day 0 Hello World solution – In this HackerRank Day 0 Hello World 30 days of code problem, we need to develop a program that prints the Hello, World message on the output screen.

Objective
In this challenge, we review some basic concepts that will get you started with this series. You will need to use the same (or similar) syntax to read input and write output in challenges throughout HackerRank.

Task
To complete this challenge, 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.

You’ve got this!

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 inputString variable may be written differently depending on the best-practice conventions of your submission language.

Problem solution in Python 2 programming.

inputString = raw_input() # get a line of input from stdin and save it to our variable

# Your first line of output goes here
print 'Hello, World.'

# Write the second line of output
print inputString

Problem solution in Python 3 programming.

# Read a full line of input from stdin and save it to our dynamically typed variable, input_string.
input_string = input()

# Print a string literal saying "Hello, World." to stdout.
print('Hello, World.')

# TODO: Write a line of code here that prints the contents of input_string to stdout.
print(input_string)

Problem solution in java programming.

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) {
      Scanner scan = new Scanner(System.in); // use the Scanner class to read from stdin
      String inputString = scan.nextLine(); // read a line of input and save it to a variable
      scan.close(); // close the scanner
      
      // Your first line of output goes here
      System.out.println("Hello, World.");
      
      // Write the second line of output
      System.out.println(inputString);
   }
}

Problem solution in c++ programming.

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {
   string inputString; // declare a variable to hold our input
   getline(cin, inputString); // get a line of input from cin and save it to our variable
  
   // Your first line of output goes here
   cout << "Hello, World." << endl;

   cout << inputString << endl; 

   return 0;
}

Problem solution in c programming.

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main() {
   char inputString[105]; // declare a variable to hold our input
   scanf("%[^n]", inputString); // get a line of input from stdin and save it to our variable
  
   // Your first line of output goes here
   printf("Hello, World.n");

   // Write the second line of output
    printf("%s", inputString);

   return 0;
}

Problem solution in Javascript programming.

function processData(inputString) {
    // Your first line of output goes here
    process.stdout.write("Hello, World." + "n"); 
    
    // Write the second line of output
    process.stdout.write(inputString);
} 


process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
   processData(_input);
});