The function `clrscr()` is used to clear the console screen...

The function clrscr() is used to clear the console screen in C and C++ programs. It is typically available in the conio.h header file, which is mainly used in DOS-based systems or systems supporting Turbo C/C++.

When clrscr() is called, it clears the text displayed in the terminal or console window, providing a blank screen to display further program output.

Important Notes:

1. Header File: clrscr() requires the inclusion of the conio.h header file.

   #include <conio.h>
   

2. Platform-Specific: clrscr() is not standard in modern compilers and environments, as conio.h is not supported in many contemporary systems like GCC, Clang, or Visual Studio.

3. Alternatives: For non-DOS systems, clearing the screen is often done using platform-specific commands, such as:

   • Windows: Calling system("cls");
   • Linux/macOS: Calling system("clear");

Example Usage:

#include <conio.h>

int main() {
    printf("Hello, World!");
    getch(); // Wait for a key press
    clrscr(); // Clears the screen
    printf("The screen was cleared!");
    return 0;
}

In the above code:

• The console first displays "Hello, World!".
• After a key is pressed, the screen is cleared using clrscr(), and "The screen was cleared!" is displayed on a clean screen.

This function is mainly of historical interest, given its limited support in modern programming environments.