How can i create a constraint in my survey form?

[Kal_Lam]

You could use the regex code to make a constraint as discussed in the post discussed previously:

How can I make a limit to the 'integer' data type (e.g. 01 to 99)?

Hi @tanzilhuda, Backing up with what @bernieseville have said you could do the same as shown in the image below: In the survey sheet of the xlsform: [image] Note: With this expression you will not be able to enter 00, hence integer between 01 to 99 are only accepted. Reference xlsform: Regex_Constraint.xlsx (10.0 KB) GOOD DAY!

You should be able to learn more about regex through our support article Restricting Text Responses With Regular Expressions.