why do we use conio.h ??

Answer 1

conio.h is to enable your program to interact with the Windows console. getch() and cprintf() are part of it for example.

Answer 2

Yep, you don't need to include it if you don't use the functions it provides.

Answer 3

if you use turbo c++ compiler you will need to add clrscr() function for cleaning the screen . in that case you will need to add conio.h too ...

Answer 4

can we execute program without writing it ?