Question type - Equation
From LimeSurvey Manual
Short description
As of Version 1.92
This question type lets the author create an equation (e.g. a calculation or tailored report) and save it in a database variable. Equations can use any syntax supported by Expression Manager.
Advanced settings
{INCLUDE(page="Advanced question settings",start="!hidden",stop="---")}{INCLUDE}
Note: unlike all other question types, if an equation is hidden, it is still computed and its value is still stored in the database.
{INCLUDE(page="Advanced question settings",start="!page_break",stop="---")}{INCLUDE}
{INCLUDE(page="Advanced question settings",start="!public_statistics",stop="---")}{INCLUDE}
{INCLUDE(page="Advanced question settings",start="!scale_export",stop="---")}{INCLUDE}