How to check if a number has been already used in math.random?

Hey there.

I believe you are looking to go through numbers using math.random.

My best suggestion is using an arrays and storing the numbers in it.

Therefore after each number store it in the array and go on.

local myarray = {}
local x = 0
local max = 5

repeat
    local y = math.random(1,max)
    if not myarray[y] then
        print(y)
        table.insert(myarray, y, y)
        x = x + 1
    end
until x == max

In the code above it is going through numbers 1, 2, 3, 4, and 5.

We are putting the information in an array to not repeat these numbers.

Then we are printing the numbers.

This may have not been 100% the most efficient way but I hope this helps!