# Formula Editor

The **Formula Editor** guides users through creating formulas.

Use the **Search** field to search through the functions by name. Or start typing in the **Formula** field to get a list of functions that match what’s entered.

Search for data fields, report cells references, and parameters in the same manner.

## Using Functions

Formulas work by applying some calculations to a few values that you give them. A basic example of a formula is `1 + 2`

. In this example, the formula comprises one **function**, the addition function (+), and two **arguments**, the addends *1* and *2*. When the report runs, the formula calculates and **returns** the sum, *3*.

Not every function takes two arguments, so functions cannot always be written as

. In most cases functions instead use the following format:*argument1***function***argument2*

Function(argument1, argument2, ...)

The addition example could also be written as `Add(1, 2)`

. This is the style that most formulas in the application use. Most functions are more abstract than simple arithmetic. Each function has a description which tells you exactly what it does and how to use it.

### Arguments

An argument is a value that a function uses to do a calculation. Functions have different amounts and types of arguments. When a function is first entered into the Formula field, there are placeholder values for each required argument. Click on a placeholder to see the description of the argument.

Some arguments are optional. Those are surrounded by brackets `[ ]`

. Some arguments are a list of values. Those are followed by an ellipsis `...`

.

Some functions take no arguments. These are formatted with empty parentheses:

`Function()`

You need to supply values for all of the function’s required arguments. Type a value into the argument space, or drag a data field or function over the placeholder.

Formulas are used in several areas besides the report design: custom sorts and groups, drilldowns, conditional formatting for cells and charts, and custom CrossTab fields, to name a few. In every area where you can use a formula you can click on the **Formula Editor** icon to open the **Formula Editor** window. These areas may require a specific type of data to be returned from the formula. Some built-in functions, such as aggregates, may be unavailable. Consult the relevant topic for the specifics.

### About Sections

Formulas which reference data fields or cells, with the exception of aggregate functions, should be in the same report section as the reference data. Detail sections repeat for every data field, group sections repeat for every group, and page sections repeat for every page. Since most formulas expect only one reference value, and not repeated values, referencing a repeated field or cell from outside of its section can return irregular data. Formulas need to repeat alongside their reference values. Aggregate functions are the exception since they are designed to evaluate once for a group of data. For more information, see Sections.

## Manual Formula Entry

You have the option of typing in your functions, data fields, parameters, and cell references manually. Use the following formatting guidelines.

### Text

Surround text with double or single quotation marks:

"Hello, World!"

'I am on fire'

If you want to use a quotation mark in the text, then surround the text with the opposite mark:

"You're on fire"

'He says "like" too often'

Do not use quotation marks around numbers.

### Data Fields

{DataCategory.DataField}

where `DataCategory`

is the name of the Data Object and `DataField`

is the name of the data field.

### Cell References

To use the value from another cell in a formula, use the following format:

`[C#]`

where `C`

is the letter of the cell column, and `#`

represents the number of the cell row.

For example, `[B5]`

refers to cell B5.

Rearranging cells can cause cell references to break.

### Parameters

Parameters return special values depending on some condition. The built-in parameters are:

`@pageNumber@`

— the current page number of the report`@reportName@`

— the name of the report`@reportFullName@`

— the name and path to the report

There may be additional parameters available, contact the system administrator for more information.

A special type of parameter called a **dropdown parameter** can be created by the system administrator. These parameters have two values: the **Value**, used by the server for processing and the **Display Value** that appears in cells and is used in formulas. These distinct values can be accessed with `@ParameterName.Value@`

and `@Parameter.DisplayValue@`

respectively. For more information, contact the system administrator.

## Syntax Checking

If there are any syntactical errors in the function, the **Formula Editor** underlines the relevant section in red, and shows a brief description of the problem. Any errors must be corrected before running the report.

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