Why doesn't my code compare the first and last number? - arrays

Question

I have to compare up to 5 numbers in my script. That also works quite well. However, my first and last number are not compared. What's the problem in my code?
local loaded = game.Workspace.TrommelValue.Value
local randomkugel = {}
for i = 0,loaded-1 do
randomkugel[i] = math.random(1,6)
for index = 0, i+1 do
if i ~= index then
if randomkugel[i]==randomkugel[index] then
randomkugel[i]=math.random(1,6)
index = 0
end
end
end
end
Thank you for helping me!

Answer 1

I don't know what game.Workspace.trommelValue.value is, but let's assume its a positive number.
First iteration
-- assign a random integer from [1-6] to `randomkugel[0]`
randomkugel[0] = math.random(1,6)
Now you run the inner loop the first time. The first cycle is skipped as i == index.
The second cylcle is skipped because randomkugel[i] is the random number and randomkugel[index] is nil
Second iteration of the outer loop. i is 1, random[1] is assigned a random value from [1-6].
Inner loop:
first run i is 1, index is 0 so the first if statement is entered.
randomkugel[1] may randomly equal randomkugel[0]. In that case you would assign a new random value to randomkugel[1] and set index to 0 which does not have any effect.
In case both values are not equal nothing happens.
second cycle of the inner loop, i is still 1, index is 2.
As there is no randomkugel[2] this cycle does nothing.
You will always skip the last cycle of the inner loop as you're comparing vs nil every time.
So your inner loop is effectively
for index = 0, i do
if i ~= index then
if randomkugel[i]==randomkugel[index] then
randomkugel[i]=math.random(1,6)
end
end
end
I guess your greatest misconception here is that you can somehow reset the loop counting variable index inside the loop body.
Any change to index is only valid after that change within the current iteration.