Header File 

conio.h  

Category 

Console I/O Routines 

Prototype 

int getch(void); 

Description 

Gets character from keyboard, does not echo to screen. 

getch reads a single character directly from the keyboard, without echoing to the screen.

getch returns the character read from the keyboard. 

Example  

#include <conio.h>
#include <stdio.h>
int main(void)
{
  int c;
  int extended = 0;
  c = getch();
  if (!c)
    extended = getch();
  if (extended)
    printf("The character is extended\n");
  else
    printf("The character isn't extended\n");
  return 0;
}

Portability