How can I use regex to validate email addresses?

How can I use regex to validate email addresses?

You can use a regex pattern like ^[\w-.]+@[\w-]+.[a-zA-Z]{2,4}$ to validate email addresses.

What does each part of that regex mean?

The pattern breaks down as follows: ^ asserts the start, [\w-.]+ matches the username, @ is the literal '@', [\w-]+ matches the domain, and .[a-zA-Z]{2,4}$ matches the top-level domain.

Are there any common pitfalls when using regex for email validation?

Yes, regex can be too strict or too lenient. It's important to balance validation with usability.

Can you provide a more comprehensive regex for email validation?

Sure! A more comprehensive regex could be ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,}$ which covers more cases.