How to make 4 digit code have no repeating numbers?
Trying to get a random 4-digit code for a locked door in my game but I want the password to have no repeating numbers. How would I do this?
Code:
1 | local startCode = game.ReplicatedStorage.startCode |
2 |
3 | local numb1 = math.random(0, 9) |
4 | local numb2 = math.random(0, 9) |
5 | local numb3 = math.random(0, 9) |
6 | local numb4 = math.random(0, 9) |
7 |
8 | startCode.Value = (tostring(numb1) .. tostring(numb2) .. tostring(numb3) .. tostring(numb4)) |
9 | print(startCode.Value) |
2 answers
One way to do this is to make an array of digits from 0 to 9
1 | Digits = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} |
We take a random number from Digits, and then remove said number since so that it cannot appear again
1 | RandoNum = math.random(1, #Digits) |
2 | Chosen = Digits[RandoNum] |
3 | table.remove(Digits, RandoNum) |
Then we can just take said number and add it to startCode.Value
If you wanted your code to be in a loop, it would look something like this:
1 | Digits = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} |
2 | for i = 1, 4 do |
3 | RandoNum = math.random(1, #Digits) |
4 | Chosen = Digits[RandoNum] |
5 | table.remove(Digits, RandoNum) |
6 | startCode.Value = startCode.Value..tostring(Chosen) |
7 | end |
Start by making a array/table for every number in the number combo.
1 | local code = {"N","N","N","N"} |
Now, let's make a for loop for every part of the table. If there's no value set, ("N") we'll change it to a random number. Next let's make sure no other number in the array/table is that number.
01 | local function check() |
02 | for i, v in pairs(code) do |
03 | if v == "N" then |
04 | return true |
05 | end |
06 | end |
07 | end |
08 | while check() do |
09 | for i, v in pairs(code) do |
10 | if v == "N" then |
11 | local suggestednum = math.random(0,9) |
12 | print(suggestednum) |
13 | local isnotothernumber = true |
14 | for i, v in pairs(code) do |
15 | if v == suggestednum then |
So there you are! A randomly generated number sequence that is 4 digits long and 2 digits will never be the same.