Limit input to 3 digits before decimal and one digit after decimal

[an_ju]

Hi All,

I am new to this platform. Need help with form building. Need to limit the user input to a maximum of 3 digits before decimal point and one digit after decimal. Can someone help!
E.g body temperature can be 99.9 or 100 or 101.2. These should be the accepted entries. Anything apart should throw an error message.

[Kal_Lam]

Welcome to the community, @an_ju! This post discussed previously should help you solve your issue:

Limit decimal digits in decimal question

Dear @Kal_Lam and @wroos I think I finally found something working as I want it , at least with the value I tried to enter on Enketo it works. So, with a Decimal question, as a Validation Criteria/Constraint, I used .<500 and regex(.,’^(\d{0,3})(\.[0-9]{0,1})?$') In that way, the maximum acceptable value is smaller than 500. It includes that there can be a maximum of 3 digits before the point, which is not really necessary as the maximum is 500, but it didn’t work if I took it away…

[an_ju]

Thank you. Will try this combo. I used regex(.,’^([0-1]{0,1}[0-9]{0,2})(.[0-9]{0,1})?$’) and int(.)>=95 and int(.)<105 in constraint to allow entry for body temperature between 95 and 105 and it works. So this allows the user to input 96(without decimal) or 96.1 as well.