getchar function will accept a character from the console
or from a file, displays immediately while typing and we need to press Enter key
Syntax of getchar() is
It returns the unsigned char that they read.If end-of-file or
an error is encountered getchar() functions return EOF.
The function "getchar()" reads a single character from the
standard input device, the keyboard being assumed because that is the standard
input device, and assigns it to the variable "a".
The following program illustrates the use of getchar function.