Header File 

stdio.h  

Category 

Console I/O Routines 

Prototype 

int getchar(void); 

wint_t getwchar(void); 

Description 

Gets character from stdin. 

getchar is a macro that returns the next character on the named input stream stdin. It is defined to be getc(stdin).

On success, getchar returns the character read, after converting it to an int without sign extension.  

On end-of-file or error, it returns EOF. 

Example  

#include <stdio.h>
int main(void)
{
   int c;
/* 
Note that getchar reads from stdin and is line buffered; this means it will not return until you press ENTER.
 */
   while ((c = getchar()) != '\n')
      printf("%c", c);
   return 0;
}

Portability