C Programming — Hello World

#include <stdio.h>

#include <conio.h>

int main()

{

printf("Hello World");

getch();

return 0;

}

The `#include` directive indicates that the specified header file will be included. In this example, `stdio.h` is the header for the standard input/output library.

The `main` function is the first function executed when the program starts. The preceding `int` indicates that the function returns an integer.

The `printf()` function means “print formatted” and prints formatted output to the screen.

The `getch()` function is used here to prevent the window from closing. Its primary purpose is to read a character from the keyboard; `conio.h` must be included to use it in this example.

The final `return 0` statement indicates that `main()` returns zero.