As others have stated, there is a single '\n' character in the input stream left over from your earlier call to scanf(). The Standard Library function fpurge() erases any input or output buffered in the given stream. The following should rid stdin of anything left in the buffer:

printf("Do you want to try another number? Say Y(es) or N(o): ");
fpurge(stdin);
response = getchar();

As others have stated, there is a single '\n' character in the input stream left over from your earlier call to scanf().

Fortunately, the standard library function fpurge(FILE *stream) erases any input or output buffered in the given stream. When placed anywhere between your calls to scanf() and getchar(), the following will rid stdin of anything left in the buffer:

fpurge(stdin);

The function fpurge() erases any input or output buffered in the given stream. The following should rid stdin of anything left in the buffer:

printf("Do you want to try another number? Say Y(es) or N(o): \n");
fpurge(stdin);
response = getchar();

As others have stated, there is a single '\n' character in the input stream left over from your earlier call to scanf(). The Standard Library function fpurge() erases any input or output buffered in the given stream. The following should rid stdin of anything left in the buffer:

printf("Do you want to try another number? Say Y(es) or N(o): ");
fpurge(stdin);
response = getchar();