Hello World in C

Here is a simple program to display hello world in c using the simple steps and comments for you to easily understand the code in a few lines. So all you want is to display the message “Hello World” on the screen. Let us now look at the program:

#include <stdio.h>
#include <conio.h>
void main()
{
// printf() displays the string inside quotation
printf("Hello, World!");
getch();
}

Output

Hello, World!

How “Hello, World!” program in c works?

• The #include <stdio.h> is a preprocessor command. This command tells compiler to include the contents of stdio.h (standard input and output) file in the program.
  The stdio.h file contains functions such as scanf() and print() to take input and display output respectively.
  If you use printf() function without writing #include <stdio.h>, the program will not be compiled.
• The execution of a C program starts from the main() function.
• The printf() is a library function to send formatted output to the screen. In this program, the printf() displays Hello, World! text on the screen.