---
title: "Expression"
slug: "expression"
updated: 2024-02-02T09:13:31Z
published: 2024-02-02T09:13:31Z
canonical: "kb.dataparc.com/expression"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.dataparc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Expression

Use the Expression wizard to apply a single line calculation to a tag’s values.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image007_003.png)

**Tag Field:** The base tag used for the expression. This is whichever tag was right-clicked when opening Tag Builder. As fields are filled out the tag switch will build with the corresponding values

**Expression Editor:** Enter the expression here. Use “IV” to call the base tag’s value, and then basic operators: “+” for addition, “-” for subtraction, “*” for multiplication, “/” for division. Any other operations require using the math class, e.g. Math.Pow(IV,2) to square the base tag’s value. See below for using other tags’ values.

**Script Editor:** Open the expression in Script Editor. The Expression Editor field must contain text for this button to activate.

**Expression Manual:** Link to help manual topic on [Expression Reference](/v1/docs/expression-reference).

#### Use Other Tags in Expression

To use other tags’ values in the expression, drag and drop them in from Tag Browser.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image009_006.jpg)