"Hello World!" in C HackerRank Solution
Objective
In this challenge, we will learn some basic concepts of C that will get you started with the language. You will need to use the same syntax to read input and write output in many C challenges. As you work through these problems, review the code stubs to learn about reading from stdin and writing to stdout.
Task
This challenge requires you to print “Hello, World!” on a single line, and then print the already provided input string to stdout. If you are not familiar with C, you may want to read about the printf() command.
Example
s=”Life is beautiful“
The required output is:
Hello, World!
Life is beautiful
Function Description
Complete the main() function below.
The main() function has the following input:
-
string s: a string
Prints
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*two strings: * "Hello, World!" on one line and the input string on the next line.
Input Format
There is one line of text, s.
Sample Input 0
Welcome to C programming.
Sample Output 0
Hello, World!
Welcome to C programming.
Solution:
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main()
{
char s[100];
scanf("%[^\n]%*c", &s);
printf("Hello, World!\n");
printf(s);
return 0;
}
Steps Used in solving the problem -
-
Step 1: First, we included all header files.
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Step 2: Then, we created a main function.
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Step 3: Then, we declared a character array s of size 100.
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Step 4: In the next line, we used ‘printf’ function to print the "Hello, World!" message in the terminal.
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Step 5: Then, we used ‘printf’ again to print the user input as string.
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Step 6: ‘Return 0’ is used to end the main function.
