Metacharacter

A **metacharacter** is a character that has a special meaning in various programming or scripting languages, particularly in the context of regular expressions, command-line interfaces, or certain computing environments. Metacharacters can alter the way text is processed or matched, rather than being treated as literal characters. Here are a few examples of metacharacters in regular expressions: - **`.` (dot)**: Matches any single character except for a newline.