Programing C | First Program

Print: Hello World in C

/*Write your comment here*/
#include<stdio.h>
#include<conio.h>
void main()
{
  clrscr();
  printf("Hello World");
  getch();
}

Program Description

This code is a simple C program that prints the message “Hello World” to the console. Here’s a breakdown of the code:

Lines 1-2:

C

#include<stdio.h>
#include<conio.h>

These lines are called header inclusions. They include standard libraries containing pre-written functions that the program can use.

• stdio.h includes functions for standard input/output operations like printing to the console (printf)
• <conio.h> ( Not recommended for modern C development ) includes functions specific to certain console environments, like clrscr (clear screen) and getch (get character).

Line 3:

C

void main()

This line declares the main function, which is the entry point of the program. In C, execution always starts from the main function.

Line 4:

C

clrscr();

This line calls the clrscr function, which is supposed to clear the console screen. However, conio.h is not part of the standard C library and might not be available on all compilers. It’s generally recommended to avoid using non-standard libraries for better portability.

Line 5:

C

printf("Hello World");

This line calls the printf function from the stdio.h library. It prints the message “Hello World” to the console screen.

Line 6:

C

getch();

This line calls the getch function from conio.h. It pauses the program execution and waits for the user to press a key. The pressed key’s character isn’t displayed on the screen (which is why it’s called getch). Similar to clrscr, getch is not part of the standard C library and might not be portable.

Overall:

This code is a very basic example of a C program that demonstrates how to use standard input/output functions to print a message to the console. It’s a good starting point for learning C programming basics. However, it’s important to note that conio.h is not recommended for modern C development due to portability issues. You can achieve similar functionality using platform-independent libraries or terminal control methods.

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