Form Validation

Form Validation is the process of checking user inputs in forms to ensure they are accurate and complete before submission. It helps catch errors early, making sure data like emails, phone numbers, and required fields follow the correct format. Validation improves user experience by giving instant feedback, often done on the client side, while server-side validation ensures security by double-checking the data.

This two-layer approach prevents invalid or harmful information from entering the system, protecting applications from bugs and security threats. Overall, form validation is essential for maintaining data integrity and smooth application performance.