How can I validate user input in my application?

How can I validate user input in my application?

You can validate user input by using techniques like regex, built-in validation libraries, or custom validation functions.

What are some common validation rules I should implement?

Common validation rules include checking for required fields, email format, password strength, and input length.

Can you give me an example of regex for email validation?

Sure! A common regex for email validation is: ^[\w-.]+@([\w-]+.)+[\w-]{2,4}$.

How do I handle validation errors in my application?

You can handle validation errors by displaying user-friendly messages and highlighting the fields that need correction.