# IsRealNumber (AnyValue)

| **Name**    | ***IsRealNumber (Any Value)***                                                 |
| ----------- | ------------------------------------------------------------------------------ |
| Syntax      | IsRealNumber (Any value)                                                       |
| Purpose     | To check whether a given value represents a real number.                       |
| Description | Returns true if the specified value is a real number. Otherwise returns false. |
| Return Type | Boolean                                                                        |
| Parameters  | Value \[System.Object] – Value to be checked                                   |

![](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FpFsnMzUkRB3JtMq93fbe%2F0.png?alt=media)

### **Example**

In this example, we will pass a string value, not a real number, to the function transformation object using a *Variables* object.

Where,

*value* = -√5

<figure><img src="https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FsPRGjCft8V5lddmAAApS%2F1.png?alt=media" alt=""><figcaption></figcaption></figure>

In the output window, you can see that the Boolean value, False, has been returned as the specified value is not a real number, rather an irrational value.

![](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FzBRSDH1FRKXZAKLZCaNb%2F2.png?alt=media)


---

# 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://documentation.astera.com/astera-data-stack-v10/functions/logical/isrealnumber-anyvalue.md?ask=<question>
```

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.