|}

Enclose a character class or group, similar to the shell. Any single character within the brackets will be matched. Hyphen can be used for defining a range of characters. Most special characters lose their special meaning. The caret sign at the beginning of the list means exclusion (<code>[^a]</code> means ''do not match a''). Some examples of square brackets in regular expressions are:

|}

Matches strings at the end of the line, (anchoring matches to the end of the line). Examples of dollar in regular expressions are: