How to ask for and limit entry of 4 digits | XM Community
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I am asking for 4 digits of an ID code. I've seen information on using "matches regex" but without enough detail regarding how to set this up in Custom & Content Validation. I found a code for: matches regex

^\\d{4}$.
I can't find how & where to enter this. The menu requires multiple entries.

https://www.qualtrics.com/community/discussion/14926/allow-4-numbers-in-the-text-box was the answer I found but without sufficient specifics

You can find custom validation documentation from the link and then select regex validation and use ^\\d{4}$
https://www.qualtrics.com/support/survey-platform/survey-module/editing-questions/validation/#CustomValidation

You don't really need regex for this. Set the validation to accept number min: 1111, max:9999, demicals:0

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