# GH_VariantType enum

Namespace: [Grasshopper.Kernel.Expressions](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.kernel.expressions.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public enum GH_VariantType
```

Lists all possible variable types supported in the Grasshopper Expression Parser.

## Values

| Name | Value | Description |
| --- | --- | --- |
| unknown | -1 | Unknown type. |
| null | 0 | Variant is a null reference. |
| bool | 1 | Variant is of type System.Boolean |
| int | 2 | Variant is of type System.Int32 |
| double | 4 | Variant is of type System.Double |
| string | 8 | Variant is of type System.String |
| point | 16 | Variant is of type Rhino.Geometry.Point3d |
| plane | 32 | Variant is of type Rhino.Geometry.Plane |
| complex | 64 | Variant is of type Grasshopper.Types.GH_Complex |