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# Using Regular Expressions in Text Searches

Regular expressions can be used to search for some unspecified or even invisible characters.

Searching with regular expressions is different from searching with wildcards. LibreOfficeDev Writer only supports searching with regular expressions.

You can use regular expressions when you find and replace text in a document. For example, "s.n" finds "sun" and "son".

1. Выберите Правка - Поиск и замена.

2. Для расширения диалогового окна нажмите Дополнительные параметры.

3. Установите флажок Регулярные выражения.

4. In the Find box, type the search term and the regular expression(s) that you want to use in your search.

5. Click Find Next or Find All.

## Примеры регулярных выражений

1. The regular expression for a single character is a period (.).

2. The regular expression for zero or more occurrences of the previous character is an asterisk. For example: "123*" finds "12" "123", and "1233".

3. The regular expression combination to search for zero or more occurrences of any character is a period and asterisk (.*).

4. The regular expression for the end of a paragraph is a dollar sign ($). The regular expression character combination for the start of a paragraph is a caret and a period (^.).

5. The regular expression for a tab character is \t.

Поиск с использованием регулярного выражения работает только внутри абзаца. Для поиска с использованием регулярного выражения по нескольким абзацам выполните поиск в каждом абзаце отдельно.

См. также

Список регулярных выражений

Using Wildcards in Formulas