Make it so the user HAS to input 12 numbers in the field...

I want to make a field where the user is REQUIRED to input 12 numbers into the field. I thought I had it covered through masking but then I figured out this doesn't require them to input as many #'s as you put... Basically I want the min. input to be 12 and the max input to be 12... help??

BUT the amount of numbers that has to be input can change based on a drop down field they previously answered. So basically for example:

if they chose option A in the drop down then they would be required to enter 10 numbers in the field.

If they chose option B they would be required to enter 12 numbers in the field. 

if they chose option C they would be required to enter 14 numbers in the field.

and so on and so forth. Any ideas? Can you do this with masking?!

Basically I just need a field that functions like this one:

That's called Input Mask. Here's how to enable it in a field https://www.jotform.com/help/381-Getting-Started-with-the-Basics-of-Input-Masking.

Here's an example to accept 12 numbers.

Yea........ but it does not REQUIRE 12 digits exactly. If you put in 11 it still passes the required verification and does not show an error.

This discussion seems to be a duplicate of your other thread. Please check my latest answer via the following link:

https://www.jotform.com/answers/1425107