Introduction
The table specifies some character classes that can
be used with regular expressions. Please do not confuse a character class with a
C# class declaration. A character class is simply an escape sequence that
represents a group of characters that might appear in a string.
|
Character class |
Matches |
|
\d |
any digit |
|
\w |
any word character |
|
\s |
any whitespace |
|
\D |
any non-digit |
|
\W |
any non-word character |
|
\S |
any non-whitespace |
A word
character is any alphanumeric character or underscore. A white space
character is a space, a tab, a carriage return, a newline or a form feed. A
digit is any numeric character. Regular expressions are not limited to the
character classes . Regular expressions can use other notations to
search for complex patterns in strings.