Random.Range never repeat

So I've been looking for a while on how to make Random.Range never the same number. And i can't seem to figure it out. can anyone help me figure this out? I don't know if it will be helpful, but here's the code i am currently trying to run.

Code (CSharp):

1. public class GlowColorz : MonoBehaviour {
2.     void Start () {
3.     SpriteRenderer renderer = GetComponent<SpriteRenderer>();
4.     renderer.color = new Color(255f, 0f, 0f, 255f);
5.     }
6.     void  OnTriggerEnter ( Collider info  ){
7.         if (info.name == "Player") {
8.             var p= Random.Range (1,8);
9.             Debug.Log (p);
10.         if (p == 1f) {
11.             SpriteRenderer renderer = GetComponent<SpriteRenderer>();
12.             renderer.color = new Color(255.0f, 255.0f, 0f, 255.0f);
13. }
14.             if (p == 2f) {
15.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
16.                 renderer.color = new Color(255.0f, 0f, 255.0f, 255f);
17.             }
18.             if (p ==3f) {
19.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
20.                 renderer.color = new Color(255.0f, 0f, 0f, 255.0f);
21.             }
22.             if (p == 4f) {
23.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
24.                 renderer.color = new Color(0f, 255.0f, 255.0f, 255.0f);
25.             }
26.             if (p == 5f) {
27.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
28.                 renderer.color = new Color(255.0f, 150.0f, 0f, 255.0f);
29.             }
30.             if (p == 6f) {
31.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
32.                 renderer.color = new Color(0f, 255.0f, 0f, 255f);
33.             }
34.             if (p == 7f) {
35.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
36.                 renderer.color = new Color(0f, 0f, 255f, 255f);
37.             }
38.     }
39. }
40. }

If anyone has tips, or answers it would be greatly appreciated.

 

is p meant to be an int or a float?

var is untyped (*hisses*) and you're using the integer version of Random.Range(...), but your if statements are all floats
also, might want to lookup switch statements (https://unity3d.com/learn/tutorials/modules/beginner/scripting/switch)

if you really only want "no two integers the same in a row", store the previous value in a manager class or static variable of some sort and do

Code (csharp):

1.  
2. do {
3. p = Random.Range(0, 8);
4. }
5. while(p == storedValue)
6.  

 

Check here also,
"How to not pick same object from array twice in a row"
http://forum.unity3d.com/threads/ho...rom-array-twice-in-a-row.298546/#post-1966441

 

Random will always give repeats, that's just the nature of randomness
I'd suggest a tetris 'bag', if you want one of each created before a duplicate (you might still get 2 in a row)
http://tetris.wikia.com/wiki/Random_Generator

 

kind of implemented your Idea but in a way that made sense to me

Code (CSharp):

1. public class GlowColorz : MonoBehaviour {
2.     public int endNum;
3.     void Start () {
4.     SpriteRenderer renderer = GetComponent<SpriteRenderer>();
5.     renderer.color = new Color(255f, 0f, 0f, 255f);
6.     }
7.     void  OnTriggerEnter ( Collider info  ){
8.         if (info.name == "Player") {
9.             var p= Random.Range (1,7);
10.             while(p==endNum) {
11.                 p= Random.Range (1, 7);
12.                 }
13.             endNum = p;
14.         if (p == 1f) {
15.             SpriteRenderer renderer = GetComponent<SpriteRenderer>();
16.             renderer.color = new Color(255.0f, 255.0f, 0f, 255.0f);
17. }
18.             if (p == 2f) {
19.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
20.                 renderer.color = new Color(255.0f, 0f, 255.0f, 255f);
21.             }
22.             if (p ==3f) {
23.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
24.                 renderer.color = new Color(255.0f, 0f, 0f, 255.0f);
25.             }
26.             if (p == 4f) {
27.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
28.                 renderer.color = new Color(0f, 255.0f, 255.0f, 255.0f);
29.             }
30.             if (p == 5f) {
31.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
32.                 renderer.color = new Color(0f, 255.0f, 0f, 255f);
33.             }
34.             if (p == 6f) {
35.                 SpriteRenderer renderer = GetComponent<SpriteRenderer>();
36.                 renderer.color = new Color(0f, 0f, 255f, 255f);
37.             }
38.     }
39. }
40. }

 

Store each number you get on a list. If the number you get it's on the least, repeat random. Else, store it.