---
id: "P:cAlgo.API.ParameterAttribute.Description"
kind: "property"
type: "T:cAlgo.API.ParameterAttribute"
url: "https://help.ctrader.com/ctrader-algo/references/Attributes/ParameterAttribute/Description/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# ParameterAttribute.Description

Member of [ParameterAttribute](https://help.ctrader.com/ctrader-algo/references/Attributes/ParameterAttribute/index.md).

## Description

Gets or sets description for input parameter that will be shown in UI.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
public string Description {get; set;}
```

Python:

```python
parameterAttribute.Description: str
```

### Returns

`string` — 

Available since cAlgo.API 5.4.

### Examples

C#:

```csharp
public partial class ParameterSample : Robot
{
    protected override void OnStart()
    {
        Print("Volume in units: {0}", Symbol.QuantityToVolumeInUnits(VolumeInLots));
    }
}
```

Python:

```python
def on_start(self):
    api.Print(f"Volume in units: {api.Symbol.QuantityToVolumeInUnits(api.VolumeInLots)}")
```

config.json:

```json
{
  "AccessRights": "None",
  "Parameters": [
    {
      "Name": "VolumeInLots",
      "DisplayName": "Volume (Lots)",
      "Type": "Double",
      "DefaultValue": 0.01,
      "Description": "Volume of each new position in lots"
    }
  ]
}
```