# CheckNumberOrExpression Method

## Overloads

| [CheckNumberOrExpression(String)](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.CheckNumberOrExpression.htm#Qlik_Engine_IApp_CheckNumberOrExpression_System_String_) |  | Checks if:<br><br>\* A given expression is valid.<br><br>\* A number is correct according to the locale. |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.CheckNumberOrExpression.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.CheckNumberOrExpression.htm)

## CheckNumberOrExpression(String)

Checks if:

* A given expression is valid.
* A number is correct according to the locale.

### Declaration

```

          CheckNumberOrExpressionResult CheckNumberOrExpression([QixName("qExpr")] string expr)
    
  
```

### Parameters

| Type | Name | Description |
| --- | --- | --- |
| System.String | expr | Expression to check. |

### Returns

| Type | Description |
| --- | --- |
| [CheckNumberOrExpressionResult](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.CheckNumberOrExpressionResult.htm) |  |