Random numbers generator

i would my program to generate an int random number between 0 and "int max", how to do that?
thanks for help
Nite

True. :-) But I meant that java.security.SecureRandom
is a better source for randomnessLike I said, it all depends on the OP requirements. You can't use better in this case, IMHO.
If the OP needs this for cryptographic purpose, then yes, SecureRandom is better. But if the OP needs it for his/her dice-game, then Random will suffice.
(SecureRandom is RNG, Random is PRNG).If you mean that SecureRandom is a true random generator and Random is a pseudo random generator, you are gravely mistaken. SecureRandom is a pseudo random generator as well!
To cite the famous Dr. Von Neumann on that subject: "Anyone who considers arithmetical methods of producing random numbers is, of course, in a state of sin.".

Similar Messages

Random numbers generator (Sorry but Search is not working!)

Hi:
First please forgive me if it's a basic question but cannot use the Search feature and need to solve this question.
Can I generate a random number (text) and replicate it to build an animation. This is the static design I need to get animated:
Thanks in advance and hope our friend Search get well soon !
Alberto

Probably a stupid question?
Probably a bad moment in the forums?
Probably the question was unclear?
Probably something impossible to do with Motion?
Probably . . . never mind!
Alberto

Help in generating the same random numbers each time of the program executi

dear friends
i am facing a problem that the random numbers generated at time of each exectuion of the program are not the same, i want to generate the same random numbers every time time i run the program. i need your help. i am giving the code in c++ if anybody can help in providing the solution so that i get the same random numbers at every run of the program. waiting for your help
wit regards
jaya shankar
#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<math.h>
class density
int s[150][150],parent[150][150],i,j,l,n,loop;
public:
void bd(void);
void css(void);
void density :: bd(void)
cout<<"ENTER THE POPULATION SIZE = ";
cin>>n;
cout<<"\nENTER THE NO.OF LOOPS = ";
cin>>loop;
for(i=0;i<n;i++)
for(j=0;j<80;j++)
s[i][j]=rand()%2;
cout<<"s:"<<s[i][j];
void density :: css(void)
int a,b;
float c;
for(i=0;i<n;i=i+2)
b=rand()%100;
cout<<"random b="<<b;
main()
density d;
d.bd();
d.css();

To generate the same random,it's impossible!
why do you want to do that?

Help in generating the same random numbers at every time of executuion

dear friends
i am facing a problem that the random numbers generated at time of each exectuion of the program are not the same, i want to generate the same random numbers every time time i run the program. i need your help. i am giving the code in c++ if anybody can help in providing the solution so that i get the same random numbers at every run of the program. waiting for your help
wit regards
jaya shankar
#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<math.h>
class density
int s[150][150],parent[150][150],i,j,l,n,loop;
public:
void bd(void);
void css(void);
void density :: bd(void)
cout<<"ENTER THE POPULATION SIZE = ";
cin>>n;
cout<<"\nENTER THE NO.OF LOOPS = ";
cin>>loop;
for(i=0;i<n;i++)
for(j=0;j<80;j++)
s[j]=rand()%2;
cout<<"s:"<<s[j];
void density :: css(void)
int a,b;
float c;
for(i=0;i<n;i=i+2)
b=rand()%100;
cout<<"random b="<<b;
main()
density d;
d.bd();
d.css();

You have to read the documentation for the java.util.Random class.
"If two instances of Random are created with the same seed, and the same sequence of method calls is made for each, they will generate and return identical sequences of numbers. In order to guarantee this property, particular algorithms are specified for the class Random"
Here is a peace of code that will do wat you need:
Random rand = new Random(100);
for(int i=0; i<10; i++)
System.out.println("Random="+ rand.nextInt(10));

How t generate random numbers at everytime of exceutuion of the program

dear friends
i am facing a problem that the random numbers generated at time of each exectuion of the program are not the same, i want to generate the same random numbers every time time i run the program. i need your help. i am giving the code in c++ if anybody can help in providing the solution so that i get the same random numbers at every run of the program. waiting for your help
wit regards
jaya shankar
#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<math.h>
class density
int s[150][150],parent[150][150],i,j,l,n,loop;
public:
void bd(void);
void css(void);
void density :: bd(void)
cout<<"ENTER THE POPULATION SIZE = ";
cin>>n;
cout<<"\nENTER THE NO.OF LOOPS = ";
cin>>loop;
for(i=0;i<n;i++)
for(j=0;j<80;j++)
s[j]=rand()%2;
cout<<"s:"<<s[j];
void density :: css(void)
int a,b;
float c;
for(i=0;i<n;i=i+2)
b=rand()%100;
cout<<"random b="<<b;
main()
density d;
d.bd();
d.css();

This will help you I think.
import java.io.*;
import java.util.*;
public class RandomTest
     public static void main( String arg[]) throws Exception
          Random number = new Random(100);
          for( int i = 0 ; i < 15; i++){
               System.out.println( number.nextInt( 100 )) ;

Does Numbers have a random number generator?

Does Number 2009 have a random numbers generator?

Wayne Contello wrote:
RAND() and RANDBETWEEN()
The function reference describes both functions in detail.
iWork Formulas and Functions User Guide does the same and from my point of view it is easier to use .
Yvan KOENIG (VALLAURIS, France) jeudi 7 juillet 2011 18:38:17 iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8
Please : Search for questions similar to your own before submitting them to the community
To be the AW6 successor, iWork MUST integrate a TRUE DB, not a list organizer !

How to generate random numbers of the same at each time of execution of thm

dear friends
i am facing a problem that the random numbers generated at time of each exectuion of the program are not the same, i want to generate the same random numbers every time time i run the program. i need your help. i am giving the code in c++ if anybody can help in providing the solution so that i get the same random numbers at every run of the program. waiting for your help
wit regards
jaya shankar
#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<math.h>
class density
int s[150][150],parent[150][150],i,j,l,n,loop;
public:
void bd(void);
void css(void);
void density :: bd(void)
cout<<"ENTER THE POPULATION SIZE = ";
cin>>n;
cout<<"\nENTER THE NO.OF LOOPS = ";
cin>>loop;
for(i=0;i<n;i++)
for(j=0;j<80;j++)
s[j]=rand()%2;
cout<<"s:"<<s[j];
void density :: css(void)
int a,b;
float c;
for(i=0;i<n;i=i+2)
b=rand()%100;
cout<<"random b="<<b;
main()
density d;
d.bd();
d.css();

Do not randomize the random number interface when you start your application. When the random number interface is not randomized when starting you get the same sequence of numbers each and every time you use it.

Is there a way to create a random text generator in AE 4 ?

Hi all,
I'm a new user of an old version of After Effects 4.1 on Windows 7.
I just gained the help on this forum to create a digital clock countdown with the Numbers Effect and the Timecode 30 setting in AE 4 and I noticed that there is a random numbers generator in that effect too.
But now I'm in the Text Effect and I'm able to put my text/title on the solid layer in a composition and apply some MM scripts to the text... mainly I've just been able to use the 'Blink' script and manipulate that script a little to make it flash faster or slower.
Since AE 4 cannot use .jsx scripts or Expressions, I guess I'm limited to MM scripts (which I've been searching for) and the built-in plug-ins and effects... but I can't find a random text generator... like where the text scrambles as if it is trying to break a code. This effect that I'm trying for would be similar to a scrambled text effect generated in Swish or other FLASH text effect generators.
So if anyone knows how to create a scrambled or random text effect in the old After Effects 4.1, please let me know.
Thanks allot,
digi

Thanks guys,
Yes, I'm using AE 4.1, per my explanation in my other posts about the timecode effect and codecs.
Since there is a built-in random number generator in AE 4.1 that is part of the Numbers Effect, I thought there may still be an after market Effect, plug-in or mm script for a random text generator.
I've been searching the web, but its a big place.
Thanks,
digi

Create a congruential random numbers

I want to create a congruential random numbers generator in java:
Below is the formula for it.
ri+1=(a*ri+b) mod M .
How can I use Math class for this?

Your guess w.r.t. a and b being constants is right. An ordinary multiple congruence random number
generator simply looks as you described:
x[n+1]= (a*x[n]+b)%M
But there's a bit more to it: a and b have to be relatively prime, i.e. gcd(a, b) == 1 and the same counts
for both a and b w.r.t. M, i.e. gcd(a, M) == 1 and gcd(b, M) == 1. Only then the 'cycle length' of your
generator will be maximal. In practice M is a power of two (2^32 comes to mind). Here's some code:public class MGRNG {
   private int a, b, M;
   private int seed;
   // ctors
   MGRNG(int a, int b, int M) { this(a, b, M, 1); }
   MGRNG(int a, int b, int M, int seed) {
      this.a= a;
      this.b= b;
      this.M= M;
      this.seed= seed;
   // next pseudo random number
   public int next() {
      seed= (a*seed+b)%M;
      return seed;
} kind regards,
Jos

Bips and random numbers while making calls

When talking on the phone (iPhone 4 with iOS 6) I get beeping noises and random numbers generated at the top of the screen. Has anyone else encountered this? HELP!

I'm having the same issue and it has just started after the recent OS update. I have a 5S. Hope there is a fix, as it is terribly annoying.

I am trying to generate an array of 30 random numbers. after every 5 readings a new vi should open and tell the user that 5 readings has been completed. and again carry on with the generation of array.

since i do not have a transducer now, i am currently generating an array of 30 random numbers. after every 5 readings a warning should be given to the user that 5 readngs are complete. this cycle should repeat. the array size is 30.
please help me out, waiting for reply asap.
once i have the transducer, i will be taking 30 analog samples and then after every 5 smaples that wraning will be displaye din a new VI
Solved!
Go to Solution.

Use a while loop with a time delay representing your sampling period.
Use the count terminal to check if equals 4, so 4th iteration=5th sample.
Use a case structure. The true case will only be executed on the 4th iteration.
In the true case place a subVI with your desired message in the front panel. Go to the VI properties window and set "open front panel when called".
The closing condition of the warnign is not giving in your description.
Consider that rather than usign a subvi for this, you could use the "One/Two/Three button dialog" or "display message" vis at the "dialog and user interface" pallete.
Please give it a try and send your own VI. Do not expect us to provide a working solution.
Regards,

How can you generate Multiple random numbers from 1 to 49?

I am very new at programming with the iPhone SDK and I need some help with a project I am working on. What I want to do is set up a window with 6 labels and 1 button. When the user clicks the button, the program will populate 6 randomized numbers each ranging from 1 to 49, and then place each of 6 numbers in a label. But each time the program ends and starts again the numbers cannot be the same, and also when the user clicks the button, no label can have the same number twice, so for example. If label 1 had the number 10, the other 5 labels cannot have that number until the button is clicked again. I know how to set up the interface, I just need the code. I would so greatly appreciate someone's help in this matter. I have been trying to do this for days and I cannot figure it out. Possibly someone who knows tons about Objective C programming can help me!
Thank-you so very much!!

I see that you're writing a lottery number generator. Perhaps the easiest way to do it is to emulate a real lottery: fill an array (NSMutableArray, probably) with the numbers between 1 and 49, pick one at random, remove that number from the array, and repeat. (You can think of the numbers as being the balls and the array as being the machine that pops them out.)
One simple way to get the random indices needed is to extract six random bytes from Randomization Services using SecRandomCopyBytes, then loop over them, using the modulo operator (%) to select an index within the size of the array.
And no, I'm not going to write your code for you. If I was going to do that, I could package and sell the app myself.

How to generate unique random numbers

Hi All,
I am wondering whether there is already a random library or built-in function available in Java to produce some random numbers between certain ranges that are not repetitive. Let's look at a common examples as follows:
Random diceRoller = new Random();
for (int i = 0; i < 10; i++) {
int roll = diceRoller.nextInt(6) + 1;
System.out.println(roll);
}My understanding from this approach is that it allows the same number to be repeated over and over again. However, I would like to find out how to continue generating random numbers from remaining ones that haven't been generated earlier.
Using the above example to illustrate my intention:
1st random number generated - possibility of 1 - 6 showed up. Say 5 is picked.
2nd random number generated - possibility of 1, 2, 3, 4, 6 only. Say 2 is picked.
3rd random number generated - possibility of 1, 3, 4, 6 available. Say 1 is picked.
4th random number generated - possibility of 3, 4, 6 left. Say 6 is picked.
5th random number generated - possibility of 3, 4 remains. Say 4 is picked.
Any assistance would be much appreciated.
Many thanks,
Jack

htran_888 wrote:
Hi All,
I am wondering whether there is already a random library or built-in function available in Java to produce some random numbers between certain ranges that are not repetitive. Let's look at a common examples as follows:
Random diceRoller = new Random();
for (int i = 0; i < 10; i++) {
int roll = diceRoller.nextInt(6) + 1;
System.out.println(roll);
}My understanding from this approach is that it allows the same number to be repeated over and over again. However, I would like to find out how to continue generating random numbers from remaining ones that haven't been generated earlier.
Using the above example to illustrate my intention:
1st random number generated - possibility of 1 - 6 showed up. Say 5 is picked.
2nd random number generated - possibility of 1, 2, 3, 4, 6 only. Say 2 is picked.
3rd random number generated - possibility of 1, 3, 4, 6 available. Say 1 is picked.
4th random number generated - possibility of 3, 4, 6 left. Say 6 is picked.
5th random number generated - possibility of 3, 4 remains. Say 4 is picked.
Any assistance would be much appreciated.If it is your school assignment then you have the answer above (List & the lists length).
(You might want to look at Collections)

How do you generate multiple random numbers between 1 and 49

I am new at mac programming and I want to make an iPhone app with the free SDK. What I would like to try is a random number generator. I imagine it as when the user clicks a button 6 random numbers from 1 to 49 would appear in a label or another control. If someone could please give me the code that would place these randomized numbers in a label I would greatly appreciate it. I know how to link all the controls together, I just need the code. Thank-you to anyone that can help!

semi-sudo code goes here
--prepare and array which will have number from 0 to 49
--loop thru the array like this
int i=0
for (i; i<=49; i++) {
int a=arc4random() % 49] ;
int b=arc4random() % 49];
--here exchange the objects so that they are shuffled
[myArray exchangeObjectAtIndex:a withObjectAtIndex:b];

Generate the random numbers

How Do I Generate Random Numbers in iWorks
Excel has the "F9" key to generate random numbers numbers don't
please see below what i'm trying to do
I open up a blank Excel worksheet, and type the number "1" into cell A1. Type the number "2" into cell A2. Then type the number "3" into cell A3. Type the number "4" into cell A4, and then type the number "5" into cell A5.
2
Type the word "PB" into cell A6.
3
Enter the function "=RANDBETWEEN(1,59)" into cell B1.
4
Enter an exact copy of this function "=RANDBETWEEN(1,59)" into cells B2, B3, B4, and B5.
5
Enter the function "=RANDBETWEEN(1,39)" into cell B6.
6
Hit the "F9" key to generate the random numbers simulating game.
But in numbers how do i do this?
Thanks!
Alex...

firstly your not asking about generating random numbers, your asking how do you make a workbook recalculate new random numbers. From M$'s website:
F9
Calculates all worksheets in all open workbooks
It does not produce random numbers the equations should produce random numbers as soon as you enter them in. If they dont then you have automatic reclaculations turned off and F9 is forcing a recalc.
In numbers there is not shortcut to forcing the workbook to recalculate other than enter data into a cell. So if you made a new table and then enter data. For every data point you enter you should see new data apear.
Was just validating the method for forcing and its not working on my ipad. I will mark this conversation and if i find it i will respond again.
Jason
Message was edited by: jaxjason

Random numbers generator

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