Regular expressions 5. Special control characters

Special control characters in a regular expression specify characters that are difficult to type.

\a alert (bell).
\b backspace.
\e ASCII escape character.
\f form feed (new page).
\n newline.
\r carriage return.
  Example : a search for "\r\n" followed by a replace "\r" changes Windows text files to Macintosh text files.
  Example : a search for "\r" followed by a replace "\n" changes Macintosh text files to Unix text files.
  Example : a search for "\r\n" followed by a replace "\n" changes Windows text files to Unix text files.
\t horizontal tab.
\v vertical tab.

### Links to this page

- Regular expressions 1. Special characters
- Regular expressions 8. Substitution special characters