# IAlfaNumString Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Syntax

```
[ValueClass]
public interface IAlfaNumString
```

## Properties

| Name | Description |
| --- | --- |
| [IsNum](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAlfaNumString.IsNum.htm#Qlik_Engine_IAlfaNumString_IsNum) | Is set to true if the value is a numeric.<br><br>JSON property name: qIsNum |
| [String](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAlfaNumString.String.htm#Qlik_Engine_IAlfaNumString_String) | Calculated value.<br><br>JSON property name: qString |