"0" is not detected as a digit by the system

[anilgnydn]

Hello everyone, in my survey I would like to put a restrictions of 12 digits in my questionaries. This is my constaint “regex(.,’^[0-9]{12}$’)” and normally it seems its working properly but when the number starts with a “0” like this “000012123123” its not accepted because it starts with “0” but i want it to consist of 12 digits in total even if the digit starts with “0”. I hope I could describe my problem clearly. I would be happy if you could help. Thanks in advance.

[Kal_Lam]

@anilgnydn, maybe if you have not gone through this post previously:

Leading Zeros Not Accepted in Regex constraint

Have you tried this: In the survey tab of your xlsform: [image] It should solve your issue (i.e. users are only allowed to enter 3 digits from 001 to 999). Reference xlsform: Regex_Constraint.xlsx (10.0 KB) If you are still facing an issue, please share with us a screenshot of the issue. The community would love to help you solve your issue. Note: if you wish to have the numbers between 000 to 999 you could simply change the regex code to (regex(., '^[001-999]{3}$') and (. >= 000))

[anilgnydn]

Ok Dear @Kal_Lam, I have solved my problem by this formula (regex(., ‘^[000000000001-999999999999]{12}$’) and (. >= 000000000001)) I forgot to change data type as text thats why it was not worked…