Validator

A validator is like your mom or dad checking your homework to see if it's correct. In the same way, a validator checks to see if something is correct or valid.

Let's say you are filling out a form online and it asks for your email address. The validator checks to make sure you have actually typed in an email address format (like [email protected]) and not something like "potato." If you made a mistake, the validator will tell you and give you a chance to fix it before you submit the form.

Validators can also be used to ensure that certain rules and standards are followed. For example, if you're playing a game and you have to follow certain rules, a validator might check to see if you followed the rules correctly.

In short, a validator is like a helpful friend who makes sure you didn't make any mistakes before you move on to the next step.