Regex (Regular Expressions)

Regular expressions (regex) are patterns used to identify and match specific sequences of characters within text. Think of them as a search language that can find words, numbers, or symbols based on rules you define. For example, a regex can locate all email addresses in a document or extract phone numbers. They are powerful tools for searching, validating, and manipulating text efficiently, especially when working with large or complex data. Essentially, regex provides a systematic way to define patterns for matching text, making tasks like data validation and text processing faster and more accurate.