Day 0: Hello, World.
Objective
Most of the coders started their coding journey by printing hello world . So 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.
Input Style
A single line of text denoting inputString (the variable whose contents must be printed).
Output Style
Print Hello, World. on the first line, and the contents inputString of on the second line.
Sample Input
Welcome to 30 Days of Code!
Sample Output
Hello, World.
Welcome to 30 Days of Code!
Explanation
On the first line, we print the string literal Hello, World.. On the second line, we print the contents of the inputString variable which, for this sample case, happens to be Welcome to 30 Days of Code!. If you do not print the variable's contents to stdout, you will not pass the hidden test case.
Recommended: Please try your approach on your integrated development environment (IDE) first, before moving on to the solution.
Few words from CodingHumans : Don't Just copy paste the solution, try to analyze the problem and solve it without looking by taking the the solution as a hint or a reference . Your understanding of the solution matters.
HAPPY CODING 😁
Solution
( Java )
import java.io.*;
import java.util.*;
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.
}
}
