Day 0 Hello World in C Hackerrank Solution

Day 0 Hello World in C Hackerrank Solution, 30 Days of Code in just a single click. We are going to solve the day 0 to day 30 total of 30 days of programming problems day by day in C Language. This is the first programming problem of 30 days of code for a hackerrank website. Hello, the world is the first program ever written in any programming language.

Below is the solution of the hackerrank 30 challenges series or day 0 hello world. The solution in c in hackerrank. You can copy the below code and paste it into the hackerrank editor or you can copy the full code and paste it into the hackerrank editor. You can directly click the below link and it will redirect to the problem page you have to just log in and run and test the code.

This is a very simple program in any programming language or we can say that this is the first program that we execute the first time in learning time of any language like C Programming language, C++ Programming language, Java language and Python language.

So basically in this program, we have to print a string Hello, World. Here we will choose C++ Domain for coding and find all solutions of the 30 Days Challenges Series. So in C++ " cout<< " is used for printing anything in the terminal so we will put the string "Hello, World." in double quotes, Below is an explanation of the program step by step.

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Day 0 Hello World in C Hackerrank Solution


#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");

  /* TO DO: Write a line of code here that prints the contents of input_string to stdout.*/

  /* Solution starts from here */

  printf("%s", input_string);

  /* Solution ends here */
  return 0;
}

Explanation Hackerrank Hello World in C Solution

string input_string;

input_string is a variable which stores the string " Hello, World. " in string format. We know that we can store strings or characters also, there is no limitation. A string may contain many characters there is no limitation.

getline(cin, input_string)

getline is used to store multiple strings with included space and next-line. getline reads line by line and stores the string in the variable and cin is used for storing anything in C++.

cout << "Hello, World." << endl;

as I already mention that cout is stream output and printf(" ") in C is a function. So for printing any string and number we just put the string between double quotes.