# clearSessionVar

The `clearSessionVar` method deletes a specified session variable, if it exists.

NOTE: If you delete a session variable, and the current conversation task has a requirement to set the variable, the conversation task asks the user to provide a new value for the variable. If the current conversation task does not have a requirement to set the deleted variable, and you use the variable in a template, the conversation task returns a placeholder string `(?)`.

To ensure that you do not get empty placeholders in your responses, Micro Focus recommends that you include a requirement for all session variables that you want to use in a response. If the session variable has been set in an earlier task, the conversation task does not ask for it again.

## Syntax

    clearSessionVar ( key )

## Arguments

Argument | Description
--- | ---
`key` | (string) The ID of the session variable whose value you want to delete.

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