The following functions can be used in formula expressions to aggregate data across repeated questions with the same tag.

Function	Definition	Example
any(<<tag>>)	Boolean indicating if there is any occurence of a question with tag DEPRECATED: USE Any	true
average(<<tag>>)	The numeric average of question values with tag	10
join(<<tag>>)	A comma separated string of all question values with tag DEPRECATED: USE ForEach	1,2,3
sum(<<tag>>)	The numeric sum of question values with tag	100
unique(<<tag>>)	Boolean indicating if all question values with tag are unique	false

Sample Expressions

sum(<<Amount>>)

'join(<<Option>>)'

any(<<Warning>>) ? 'You have warnings' : ''