Itterate through list on button click

Unity Engine
1 
public List<GameObject> top = new List<GameObject>();
    public int topnum=0;
public void changetop()
    {
        Debug.Log ("sucess");
        Debug.Log (top.Count);
        topnum++;
        if (topnum > top.Count - 1)
            topnum = 0;
        for (int i = 0; i >= top.Count; i++) {
            if (i ==topnum)
                top [i].SetActive (true);
            else
                top[i].SetActive(false);
               
        }
    }

I wana iterate through list containing gameobjects and activate next one and deactivate rest.
My above code isnt working. Any1 knows wats wrong

Happy Christmas
Thanks

2

Are there any errors being thrown? Have you put items into the list to test them?
This code should also help:

top[topNum].SetActive(false);
topNum = (topNum + 1) % top.Count;
top[topNum].SetActive(true);
3

Thanks
Your code works but mine doesnt weird

4

That’s alright I suspect the problem was with the for loop, in your original script.

for (int i = 0; i >= top.Count; i++)
// Should probably be
for (int i = 0; i < top.Count; i++)
5

Yes, he used greater than or equal To, not less than.