How to validate a response to 3 digits followed by one uppercase letter

[prasenjit_mondal]

Hi everyone, I am very new to Kobo. In my form, I want to enter a participant ID that would be three digits coupled with an uppercase letter, such as “872M” or “528L”. The code I am using is

regex(., ‘^[1]{3}.[A-Z]{1}.$’)

But this does not seem to work.

Thanks

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1. 0-9 ↩︎

[osmanburcu]

Hi @prasenjit_mondal, Welcome to community!

You can use regex(., '^[0-9]{3}[A-Z]$') and you can use this documentation for future references

https://support.kobotoolbox.org/restrict_responses.html

[prasenjit_mondal]

@osmanburcu Thanks much. this was very helpful.

[Kal_Lam]

@osmanburcu,