Regular expressions

Regular expressions, often abbreviated as regex or regexp, are sequences of characters that define a search pattern. They are commonly used for string searching and manipulation in programming, data processing, and text editing. Regular expressions allow you to match, search, and replace text based on specific patterns, enabling complex string processing tasks. ### Key Concepts of Regular Expressions: 1. **Literal Characters**: These are regular characters that match themselves, such as `a`, `1`, or `?`.