#include <stdio.h>
#include <ctype.h> /* For tolower() function */
void main()
{
char answer = 'N'; /* Records yes or no to continue the loop */
/* check for more input */
printf("Do you want to enter another value? (Y or N): ");
scanf(" %c", &answer );
if( tolower(answer) == 'n' )
printf("You typed n. ");
}