# null

# diagIsParameterConstant, diagIsRespParameterConstant

[Valid for](../../../Shared/FeatureAvailability.md): CANoe DE

## Function Syntax

* `long diagIsParameterConstant(diagResponse object, char[] qualifier)`
* `long diagIsParameterConstant(diagRequest object, char[] qualifier)`
* `long diagIsRespParameterConstant(diagRequest object, char[] qualifier)`

## Method Syntax

* `diagResponse::IsParameterConstant(char[] qualifier)`
* `diagRequest::IsParameterConstant(char[] qualifier)`
* `diagRequest::IsRespParameterConstant(char[] qualifier)`

## Description

Returns 1 if the parameter is declared constant in the diagnostic description.

## Parameters

* **object**: Diagnostics object
* **qualifier**: Parameter qualifier

## Return Values

1 for true or [error code](../CAPLfunctionsDiagnosticsErrorCode.md).

## Example

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