// Print the format of a given cubemap.
var c : Cubemap;
if (c != null)
    Debug.Log(c.format);
else
    Debug.Log("No cubemap was assigned, please assing one on the inspector.");

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Cubemap c;
    void Example() {
        if (c != null)
            Debug.Log(c.format);
        else
            Debug.Log("No cubemap was assigned, please assing one on the inspector.");
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public c as Cubemap

    def Example():
        if c != null:
            Debug.Log(c.format)
        else:
            Debug.Log('No cubemap was assigned, please assing one on the inspector.')