a perfect random number algorithm?

Can a computer really create a random number? I mean where is it based on?

A random function is not truly random, it’s one of any number of equations that yields numbers that are seemingly random, and is “seeded” with a number of choice. Most languages allow you to seed your random function, and if you use the same seed, the function will give the same results in order every time. Flash automatically seeds it using something that changes regularly (the day and time I assume) and we end up with our random numbers

http://pastie.org/393526

The above is a common one

Hi! Rahul…

I have done it long time back.. Can guide you for free..if you want source it will cost you USD 125

so here is the logic

create 4 arrays

a1 a2 a3 and a4

in array a1 – push values of 1 digit

in array 2 – push values of 2 digit

in array 3 push values of 3 digit

in array 4 push values of 4 digit

now create an array a5

select 5 values from each array and combine them and push them in array a5

you may decide how many items you want from each array

hope i am clear

regards

sanjeev

Yo, a random number is a random number! If you alter the logic behind the random function to get more small numbers… you break the randomness…

The probability of getting numbers in the interval 1-99 is equal with the probability of getting numbers from the interval 6001-6099.

my random distribution test. 50 numbers per second, from 0 to 500. simple Math.random() from flash

Sanju.. can you just once post a comment on the forums without adding your fee?

Can a computer really create a random number? I mean where is it based on?

A random function is not truly random, it’s one of any number of equations that yields numbers that are seemingly random, and is “seeded” with a number of choice. Most languages allow you to seed your random function, and if you use the same seed, the function will give the same results in order every time. Flash automatically seeds it using something that changes regularly (the day and time I assume) and we end up with our random numbers

http://pastie.org/393526

The above is a common one

If that makes sense

people who bought ticket from 1000 to 9999 will have more chance to win.

This makes no sense. If people are buying a single ticket/number than why are you comparing ranges? You’re just taking an arbitrary range (0-999) then taking a different arbitrary range which is ~9x larger (1k-10k) and saying one occurs more frequently.

Any modifications you do to the algorithm will be directly skewing the results towards a range of numbers.

U can always use probability distribution to create your own random no. set. all u have to do is correct the output so that the mean is toward the the three digit sequence. but this will break the concept of randomness

Hey

I have a good and easy solution for you. In Actionscript 3 Cookbook is a class, that generates random numbers between two numbers.

import ascb.util.NumberUtilities;
NumberUtilities.random(1, 100);
//generates a random number between 1 and 100

So I optimize this a little bit and you would like to get so many 1 digits number as 4 digits number. So this loop gives 5 numbers of each digit.

import ascb.util.NumberUtilities;

var counter:int = 1;
for(var i:uint = 0; i < 20; ++i)
{        
    if(!(i%5))
    {
        counter *= 10;
    }

    trace(NumberUtilities.random(0.1 * counter, 1 * counter));
}

7
5
6
10
3
36
68
59
82
24
113
233
842
960
271
7994
3414
6970
2148
6641

You can download the class here.

P.S. When you dont know, how the modulo operator works. There is a new tutorial at the activeden blog, where I explain it clearly.