# parameters

> Parameters are used to communicate between scripting and the controller. They are used to drive transitions and blendtrees for example.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Animations](/engine/6000.7/script-reference/unityeditor/animations.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public AnimatorControllerParameter[] parameters { get; set; }
```

### Remarks

It's important to note that the AnimatorControllerParameters are returned as a copy. The array should be set back into the property when changed.

### Examples

```csharp
using UnityEngine;
using UnityEditor;

class ControllerModifier
{
    UnityEditor.Animations.AnimatorController controller;

    public void ModifyParameters(int parameterIndex, string newName)
    {
        AnimatorControllerParameter[] parameters = controller.parameters;
        parameters[parameterIndex].name = newName;
        controller.parameters = parameters;
    }
}
```