---
type: "sdc-page"
title: "SDC: StructureDefinition-sdc-questionnaire-calculatedExpression-intro"
source: "sdc/input/pagecontent/StructureDefinition-sdc-questionnaire-calculatedExpression-intro.xml"
---
# SDC: StructureDefinition-sdc-questionnaire-calculatedExpression-intro

Additional details on the use of this extension can be found on the [Form Behavior](/sdc-behavior#calculatedExpression) page. For guidance on how `calculatedExpression` supports dynamic calculations based on other answers, refer to the [Expressions page - calculatedExpression](/sdc-expressions#calculatedExpression) section.