What are some examples of input validation?

What are some examples of input validation?

Input validation is crucial for ensuring data integrity. Examples include checking for valid email formats, ensuring passwords meet complexity requirements, and verifying that numeric inputs fall within a specified range.

Can you give me a specific example of validating an email address?

Sure! A common method is to use a regular expression to check if the email follows the format '[email protected]'. For instance, you can use the regex pattern ^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$.

What about validating a password?

For password validation, you might require at least 8 characters, including one uppercase letter, one number, and one special character. This ensures stronger security.

How can I validate a date input?

You can validate a date by checking if it matches a specific format, like 'YYYY-MM-DD', and then ensuring that the date is a real calendar date, such as not allowing February 30.