# Check box input A boolean input interaction item is used when the operator needs to answer a true/false question of lesser importance. Boolean inputs show up as checkboxes in the Flow Client. Boolean inputs have the following properties: * **Target Variable**\ The name of the new variable in which to store the choice entered. A positive choice (checked) creates a variable value of true, while a negative choice (unchecked) creates a variable value of false. * **Prompt**\ The label to be displayed over the check box input field. * **Default Value**\ Either false (unchecked), true (checked) or a variable reference to a value of either false or true. * **Condition To Hide** Add the condition that must be met for the control to be hidden. If left empty, the control will be visible in the user step. Note that when controls are hidden, empty variables will be created, unless default values or pre-defined data exist. * **Must be Checked** Check box if the field is mandatory * **Merge behavior** The control behavior at reloading, see [User step reloading](/development/flow-studio/applications/workflow/user-step.md#user-step-reloading). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.novacuraflow.com/development/flow-studio/applications/workflow/user-step/check-box-input.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.