Day 0: Hello, World-30 Days of Code HackerRank Solution

Day 0: Hello, World

We will solve Day 0: Hello, World Hacker Rank Challenge. In this challenge, you have to use the basic input and output concepts to complete it. You can use basic input-output functions to complete it.

Day 0: Hello, World Hacker Rank Challenge.

Task

You have to read a line of input from stdin to a variable, print Hello, World on a single line, then, print the value of the variable read from stdin on a second line.

Input Format

An Input String to print on to stdout.

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Hello World Hacker Rank Solution in C

Using printf print the string to stdout.

printf("%s",input_string);

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {
    // Declare a variable named 'input_string' to hold our input.
    char input_string[105]; 
    
    // Read a full line of input from stdin and save it to our variable, input_string.
    scanf("%[^\n]", input_string); 
    
    // Print a string literal saying "Hello, World." to stdout using printf.
    printf("Hello, World.\n");
    
    // TODO: Write a line of code here that prints the contents of input_string to stdout.
    printf("%s",input_string);
    return 0;
}

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Hello World Hacker Rank Solution in C++

Using cout print the string input.

std::cout<<input_string;

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main() {
    // Declare a variable named 'input_string' to hold our input.
    string input_string; 
    
    // Read a full line of input from stdin (cin) and save it to our variable, input_string.
    getline(cin, input_string); 
    
    // Print a string literal saying "Hello, World." to stdout using cout.
    cout << "Hello, World." << endl;

    // TODO: Write a line of code here that prints the contents of input_string to stdout.
   std::cout<<input_string;
    return 0;
}

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Hello World Hacker Rank Solution in Java

Using System.out.println() method print the input string.

System.out.println(inputString);

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.");
        System.out.println(inputString);
	    // TODO: Write a line of code here that prints the contents of inputString to stdout.
	}
}

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