How to use constraint for age between 18 to 65 years in KoBo form?

[Kal_Lam]

Welcome back to the community, @Hassani! You should be able to use the constraint as discussed in our previous post:

How to limit an entry from 1 to 100 excluding 9, 21 and 97?

You could do it as outlined in the image shared below: In the survey tab of your xlsform: [image] Data entry screen as seen in Enketo: when a condition is not met [image] Data entry screen as seen in Enketo: when a condition is not met [image] Data entry screen as seen in Enketo: when a condition is not met [image] Data entry screen as seen in Enketo: when a condition is not met [image] Data entry screen as seen in Enketo: when a condition is not met [image] Data entry s…