RefreshNotes: C Character Classification Functions

Classification Functions:

isalnum	int isalnum(int any_character);
isalpha	int isalpha(int any_character);
isblank(C11)	int isblank(int any_character);
iscntrl	int iscntrl(int any_character);
isdigit	int isdigit(int any_character);
isgraph	int isgraph(int any_character);
islower	int islower(int any_character);
isprnt	int isprint(int any_character);
ispunct	int ispunct(int any_character);
isspace	int isspace(int any_character);
isupper	int isupper(int any_character);
isxdigit	int isxdigit(int any_character);