conio.h header used in c programming contains functions for console input/output. Some of the most commonly used functions of conio.h are clrscr, getch, getche, kbhit etc. Functions of conio.h can be used to clear screen, change color of text and background, move text, check if a key is pressed or not and many more. conio.h file is provided by Borland turbo c compiler and GCC compiler doesn't support it.