In using the concat() function involving using fixed terms, such as 'and' shown in the example, in between referenced values, the term 'and' would be shown in the field as a default.
For example, I had used the functions as below to returns two result into one field:
In the Survey123 form, I will get '()' as a default:
It works well once the prequel fields are selected:
However, I do not want the "()" or any other fixed character/s to be showing until the prequel information has been selected. How do I set it so it shows an empty field on default?