Routine | Use |
isalnum | Alphanumeric |
isalpha | Alphabetic |
isblank | Printable, with no symbol |
iscntrl | Control |
isdigit | Decimal digit |
isgraph | Printable non-space |
islower | Lower case |
isprint | Printable |
ispunct | Punctuation |
isspace | Whitespace |
isupper | Upper case |
isxdigit | Hexadecimal digit |