What is Getch C?
getch() is a way to get a user inputted  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier. It can be used to hold program  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier, but the " characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier" is simply a side-effect of its primary purpose, which is to wait until the user enters a character.  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier() and  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier() are used to read a character from screen.

What is %d in C called?
%d is used to  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier the output in C  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier language. If we want to print an integer, we use %d. It is called a format  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier. ... “%d” within format string in  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier, for instance, denotes that the format of the input is  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier( decimal integer).

What is conio h in C?
h is a C header file used mostly by MS-DOS compilers to provide  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier input/output. It is not part of the C standard  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier or ISO C, nor is it defined by  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier. This header declares several useful library functions for performing " characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier input and output" from a  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier.

What does #define do in C?
In the C Programming Language, the #define  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier allows the definition of macros within your  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier code. ...  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier definitions are not variables and cannot be changed by your program code like variables. You generally use this syntax when creating  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier that represent numbers, strings or expressions.

What is enum in C?
 characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier is a user defined datatype in C  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier. It is used to assign names to the  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier constants which makes a program easy to  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier and maintain. The keyword “ characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier” is used to declare an  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier. ... The  characterconsoleconstantsdirectiveenumEnumerationexecutionformatgetchgetcharholdingintegrallanguagelibraryMacronumericPOSIXprogramprogrammingreadscanfsourcespecifier keyword is also used to define the variables of enum type.