Unformatted Input Function

Unformatted Input Function	Header File	Use of the function
1) getch( );	conio.h	It reads the typed single character instantly but does not echo / display it on the screen. Enter key is not required
2) getche( );	conio.h	It reads the typed single character instantly and echoes / displays it on the screen. Enter key is not required.
3)getchar();	stdio.h	It reads the typed single character only after hitting the enter key. It echoes / display the character on the screen.
4) gets();	stdio.h	It reads the typed string completely only after hitting the enter key. It echoes the string on the screen

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