Random number without repeat

Rafik30905 · February 28, 2021, 4:47pm

Its possible, show random number without repeat?

TIMAI2 · February 28, 2021, 4:51pm

Yes, when you generate a random number check it against a list of previously added random numbers, if it is in the list, generate again until your new random number is not in the list, then add it to the list! Store the list in the tinydb, or tinywebDB / cloudDB if required across app users.

Alpha2020 · February 28, 2021, 4:52pm

Try this-

TIMAI2 · February 28, 2021, 4:54pm

@Alpha2020 - you need to add the new number to the list as well

Alpha2020 · February 28, 2021, 4:54pm

Oh sorry, I will edit it

Rafik30905 · February 28, 2021, 5:02pm

Sorry @ TIMAI2 I don't understand your answer. Tell me the details. Thank you.

TIMAI2 · February 28, 2021, 5:04pm

@Alpha2020 blocks images says it all

Rafik30905 · February 28, 2021, 5:07pm

ok thanks,

SteveJG · February 28, 2021, 5:07pm

https://imagnity.com/tutorials/app-inventor/shuffle-list-unique-random-numbers/

Juan_Antonio · February 28, 2021, 5:57pm

This algorithm is more didactic to do with blocks, but if you want an extension to do it directly...
com.KIO4_Random.aix (6.8 KB)
aleatorio1

RAFIK_905 · March 2, 2021, 9:16am

Not Like This. I Have need show Single number. How Can I do This?

Alpha2020 · March 2, 2021, 9:36am

So set the random integer block like this-
random integer from 1 to 9

TIMAI2 · March 2, 2021, 9:43am

@Rafik30905 @RAFIK_905 Still using two account I see...

RAFIK_905 · March 2, 2021, 9:56am

Oh Yes,
Sorry.....
One Use Laptop Others my Mobile. I remove One Account now.
Thank You.

RAFIK_905 · March 2, 2021, 10:10am

@TIMAI2
Can you Help me? I Have need show Single Random number without repeat. How Can I do This?
Exm: I Select 1 to 10 Number for Random use.
When I Click button1, label 1 show single number from (1 to 10)
2nd click, 3rd click, 4th click......... 10th click = Label 1 show single number without repeat. when finessed random number output any Notice or others.

TIMAI2 · March 2, 2021, 11:25am

Use @Alpha2020's blocks, and add the variable "global RandomNumber" to your label text.

ABG · March 2, 2021, 4:33pm

This technique depends on having a limit on the size of your random numbers, say 10...

init a global list remaining_randoms as all numbers from 1 to limit.
each button click, pick a random index from 1 to length of list remaining_randoms
- display the selected item from list remaining_randoms using that index
- remove the random index number from the remaining_randoms list
- if the remaining_randoms list is an empty list, disable the button.

TIMAI2 · March 2, 2021, 4:41pm

The OP wanted to finish after all the numbers had been selected. A more complete example on that basis:

RAFIK_905 · March 5, 2021, 6:01am

Thank's Everyone, I solve My Problem, Try this Link System.
https://puravidaapps.com/snippets.php#2removerandom

system · March 12, 2021, 6:05am

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