I would like  a read-only field to calc a concatinated value based on a mix of text and numeric field entries I see numeric examples on youTube using syntax like;

([19] < 50) ? ([19]+[24]) : [19]

But can i write conditional default value for a field that considers a mix of text and numeric fields and what would the syntax look like for something like:

if field 20 = 'foo' then 'bar' else 'fighters'