| Class |
Description |
| [[:alpha:]] |
Matching any alphabetical character, either upper or lower case |
| [[:alnum:]] |
Matches any alphanumeric character 0-9, A-Z, or a-z |
| [[:blank:]] |
Matches a space or tab |
| [[:digit:]] |
Matches a numerical digit from 0 through 9 |
| [[:lower:]] |
Matches any lowercase alphabetical character a-z |
| [[:print:]] |
Matches any printable character |
| [[:punct:]] |
Matches any punctuation character |
| [[:space:]] |
Matches any white-space character: space, Tab, NL, FF, VT, CR |
| [[:upper:]] |
Matches any uppercase alphabetical character A-Z |
No Comments