---
title: "Expression Parameter"
slug: "expression-parameter"
description: "How expression parameters let you pass a calculated value into a task or report, evaluated at runtime rather than fixed in advance."
updated: 2026-10-08T13:15:16Z
published: 2026-10-08T13:15:16Z
canonical: "help.mail-and-deploy.com/expression-parameter"
---

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# Expression Parameter

### General

Some Expressions have additional parameters that may be used within the expression. This type of placeholder can be used to access one of these parameters.

**Example:** Expressions of style properties of a Table Style have a CellValue parameter that contains the value of the cell for which the style property is being evaluated.

### Syntax

The syntax for this type of placeholder is:

Expression Parameter Placeholder Syntax

[<name_of_parameter>]

### Example

Let's suppose you write an Expression for the Font property of a Table Cell Style; in that context, the CellValue expression parameter is available, which contains the value of the cell for which the style property is being evaluated. An expression could look like this:

Expression Parameter Placeholder Example

If([CellValue] = "David", "Arial", "Tahoma")

If the value of the cell for which the style property is being evaluated equals David, the cell will have the font Arial; otherwise the font Tahoma will be used.