Introduction to Regular Expressions

Regular expressions, also known as regex, are a powerful tool used to match and manipulate text based on patterns. They provide a concise and flexible way to perform complex search and replace operations in strings. Regular expressions are widely used in various programming languages, text editors, search engines, and other applications where pattern matching is required.

Whether you are a beginner or an experienced developer, understanding regular expressions is essential for working with textual data effectively. By mastering regular expressions, you can save time and write more efficient code.

In this lesson, we will explore the basics of regular expressions, including the syntax, common metacharacters, and character classes. We will also learn how to use regular expressions in Python to perform pattern matching, substitution, and validation tasks.