Random.rotation

Description

Returns a random rotation (Read Only).

// Sets a random orientation for the object.
transform.rotation = Random.rotation;

using UnityEngine;

// Click button and a rotation will be applied

public class ExampleClass : MonoBehaviour
{
    void OnGUI()
    {
        if (GUI.Button(new Rect(10, 10, 100, 50), "rotation"))
        {
            transform.rotation = Random.rotation;
        }
    }
}