What are some examples of validation rules?

What are some examples of validation rules I can use in my application?

Validation rules are used to ensure that data entered into a system meets certain criteria. For example, you can use rules like 'email must be in a valid format' or 'password must be at least 8 characters long.'

Can you give me more specific examples?

Sure! Here are a few:

1. Required fields: Ensure that fields like name and email are not left empty.
2. Numeric range: Validate that a number falls within a specific range, like age between 18 and 65.
3. Date format: Check that a date is entered in the format YYYY-MM-DD.

What happens if the validation fails?

If validation fails, the system typically provides an error message to the user, indicating what needs to be corrected before submission.

How can I implement these validation rules in my code?

You can implement validation rules using programming languages like JavaScript or Python. For example, in JavaScript, you can use regular expressions to validate email formats.