LIST

Syntax
LIST(pattern, 'optionalFilterFormula')

Example

 SUM(LIST('q[0-9]+')) sums answers for fields named q1, q2 etc
 
 COUNT(LIST('q[0-9]+', '{{this}} = 5')) counts q1,q2 etc fields where answers equal to 5

Notes

List results are typically used with functions like SUM()/COUNT() to calculate results on fields that follow a common naming convention - e.g. survey fields like q1, q2, q3 etc.

Second optional parameter applies a filter formula to the answers gathered, leaving only answers that pass the condition. Use {{this}} to refer to the answer value in formula.

Related

TOLIST
TOLIST (Multi-field)