# VB - Relatively Prime Numbers ?

Mar 1, 2012

I have this number x and i wanted to find all numbers which are relatively prime to it.

My code so far:

For i = 1 To x-1
if [number n is relatively prime to x] Then
End If
Next

## How To Generate Prime Numbers

Oct 11, 2009

I want to rite an application that will print first n prime numbers. For example if user enters 7 you should display: 2 3 5 7 11 13 17 Assume that the user will enter only integer values from 1 to 100.

this is what I have so far

Dim intNum As Integer
Dim intX As Integer
Dim strOut As String

[Code]....

## 398 Million Prime Numbers And Growing?

Aug 17, 2011

[URL]

Each set of ( 1 million ) prime numbers is in a ZIP file just click on say 1st Million

Here is a similar page which is a lot easier on the eyes:>>

[URL]

These are of course great to use in any security application or as part of any password.

However with the list so readily available on the internet is it such a good idea to use a prime number as part of a password? Food for thought perhaps? ....

I guess it depends on how long it is too.  :-)

You could try to remember one that is close to an important date or other number that you know maybe?

If you are more paranoid use more than one prime number in a password with other characters ( UPPER and lower case letters etc ).

[URL]

## Displaying All Prime Numbers In ListBox

Mar 13, 2010

I am suppose to write a program using if statements and loops: Create an application that reads an integer number from the user and then displays in the List Box all prime numbers (for this project we are going to violate "positive" rule and make our prime numbers be negative as well) between user's number and zero 5 numbers in one row. The application also displays how many prime numbers there are between user's number and zero, and the total sum of all these prime numbers.

## Loop Displaying Prime Numbers?

Jun 20, 2012

I'm having a serious brain fart over this but I need a looping statement that will display all prime number from 6 to 10000.

## Prime Numbers In Console Application?

Mar 4, 2010

i need a prime numbers in console application in vb.net

## Prime Numbers With Inline Functions?

Jul 9, 2009

Just out of curosity, what's wrong with the following line. I'm trying to create a range of integers (3,4,5...,50) and then filtering out only those numbers which are not divisible by any integer less than themselves (bruteforce way of finding primes).

Enumerable.Range(3, 50).Where(Function(x) Not Enumerable.Range(2, x - 1).Any(Function(y) x Mod y = 0))

## Program For Prime Numbers Stumped?

Feb 25, 2010

Simple Program for Prime numbers stumped?

## Vb Function For Making Prime Numbers?

Nov 21, 2010

I made a form with a two text boxes for user input.A (lower bound) and an (upper bound), and then a text box to display all prime numbers in that range.I can't figure out what I am doing wrong, my error checking works properly but my math onlyreturns a true or false.

Function
Prime(ByVal findPrime
As Int32)

[code].....

## Basic Prime Numbers Array Program?

Apr 20, 2011

First off, I'm not sure if this is the right forum, please move it if it isn't. I am only just beginning with visual basic and I am trying to write a basic program to calculate the prime numbers from 1 to 100. This is what I have so far:

[Code]...

## Create A Program That Finds Prime Numbers?

Oct 7, 2010

So I have been assigned to create a program that finds prime numbers. And then for the final part of the program I need to have the computer find the millionth prime.

## Determine Prime Numbers - Calculate Button?

Mar 17, 2011

I am creating an application that takes two numbers (lower and upper) and determines the prime numbers

Private Sub calculatePrimesButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculatePrimesButton.Click
'declare variables
Dim number As Long
[Code] .....

Once I hit the calculate button nothing comes up. I've tried adding the first code inside the function with the remaining code but no result. Now I'm putting the first code in with the calculate prime button. I am guessing there's a sqrt method that needs to be applied but I am not sure if it should be part of the function or the main?

## Function To Check For Prime Numbers Within A Range?

Dec 4, 2010

I have two user inputs (as textboxes) for two numbers I'm looking to check for all the prime numbers with the range of those two numbers and display them within a multiline textbox, however my code returns nothing but zeros, and I have seen easier ways to do it without functions but I am curious as to how to go about calculating primes within the function.[code]...

## Make A Program For Finding Prime Numbers?

Dec 21, 2011

I needed to make a program for finding prime numbers. The logic is that you have to put limits n & m and then LOOP and odd-integer P between n & m inclusive. I have a button to click on my form that displays 2 message boxes, one saying " enter upper limit" and the other say "enter lower limit". I need now to get the results of the odd prime numbers between the limits into a list box!

Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[Code].....

## Calling A Function To Display A Range Of Prime Numbers

Dec 5, 2010

I am trying to create a form that allows users to input two numbers a high bound and a low bound then when you click the calculate button it determines all the primes within the range and displays those numbers within a multi-line text box. It seems I have everything working except how to display the prime numbers, the result from the following code displays nothing but zeros so I suspect that the range is not being saved somehow? I have asked this on other sites and people just give me completely different code or their own, can anyone help me with this specific code without changing the underlying code, I have a feeling I might be missing a variable or I am calling the function incorrectly.[code]

## Made A Program For Generating Prime Numbers In A List Box?

Dec 24, 2011

So I made a program for generating prime numbers in a list box. My initial code had them listed like this:

2
3
5
7
..ect

Now I have them listed in pairs like this :

[Code]...

## Simple Program To Show Random Prime Numbers

Feb 25, 2010

Basically what I am making is a form with just one button and 2 text boxes. The purpose of it is that when I click the button 2 random PRIME numbers between 100-999 will show up in the boxes. With my code I have now, the numbers that show up in the boxes aren't always Prime.

My current Code is.......
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Randomize()
Dim p, q, i, j As Integer
[Code] .....

## VS 2010 Basic Prime Numbers Array Program?

Apr 20, 2011

First off, I'm not sure if this is the right forum, please move it if it isn't. I am only just beginning with visual basic and I am trying to write a basic program to calculate the prime numbers from 1 to 100. This is what I have so far:Dim flag As Integer Dim ar(101) As Integer

[Code]...

## VB Prime Number Looping

Jan 18, 2010

I've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work.[code...]

## VB Prime Number Looping?

Mar 2, 2010

I've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work

## Check Whether An Inputted Number Is Prime?

Sep 9, 2009

I'm working on a console application in VB .net that checks a number that the user has inputted, and tells you whether the number is prime.

The number that has to be inputted has to be between 1 and 100. I have all the code so far and at the moment it can check whether the number is or isn't within the boundries.

## Compute Whether An Integer Number Is Prime Or Not ?

Feb 28, 2008

What i'm trying to do is compute whether an integer number is prime or not. The program performs this analysis for all odd numbers from 3 up to an input integer limit, for example 100. If the integer in the range 3 to limit is prime, a message stating so is printed. Otherwise, a message is printed that lists at least one other integer divisor. The output for each analyzed number consumes one line of text.

A sample output is shown below:

Limit is 100:
Number 3: is prime
Number 5: is prime
Number 7: is prime

[CODE]...

I understand I need to use loops, boolean functions, vbmath(), strings and multi-line out via concatenation. So I can put this is words how I think it should be done but not so great putting the code together

Test all integers up to the SQRT of the number (100)

limit = math.sqrt(100) + 1

Followed by 1 For statement
For c = 0 to 100 step 2?
And an If statement
If ......
result = false

## Determining If An Integer Entered Is Prime

Mar 22, 2009

i need to alter the code to determine if an integer entered by a user is prime preferably to determine if the number entered (between 1 and 50 is even or odd and prime from 51 to 100) i have the code for listing primes from 51-100 (or whatever range needed)but can i condense the code to a smaller foot print rather than have three different sections for each request

[Code]...

## Determining Prime Number In A Program?

Mar 14, 2012

I just started to use visual basic last month and I only know the basic codes. No matter how hard I try to understand the codes given by the other member, I can't understand it.So the program I'm making is to show all the inputted values and determine the even numbers, the odd numbers and the prime numbers.I don't know how to get the prime numbers.

Private Sub op1_Click()
a = InputBox("Input Endpoint: ")
For x = 1 To a

[code]....

## Create A Function That Checks If A Number Is A Prime?

May 10, 2011

I've been trying to create a function that checks if a number is a prime. according to [URL]..I have created a function although It doesn't work as expected.

[Code]...

It sometimes returns true for composite numbers. oh and I know if you google it you get functions that do this, but most of them look inefficient so i'm trying to make my own.

## Get The Prime Number From The User And Give Its Factors?

May 25, 2010

i wrote some code that is suppose to get the prime number from the user and give its factors but there's some error

Dim t As Double
Dim n As Double
Dim ans As Double
Dim exp1 As Double

[code].....

## Prime Factor Finding - Adding CheckBox?

Nov 13, 2009

So far I have made a program that can find all the factors of a number (e.g type in 24 and you'll get 1 * 24, 2*12, 3*8, 4*6,). What I would like to do now is add a check box (called Show_Prime_Factors_chk) that when checked it will also show all the prime factors below all the normal factors.

## Prime Number Checker Unbelievably Slow?

Feb 13, 2011

I have this piece of code which checks whether a given number is prime:

If x Mod 2 = 0 Then
Return False
End If

[code].....

## Prime Number Output With List In Textbox

Dec 11, 2009

I am not getting an output with a list, I can only get the last number of the statement in a text box.

Dim lowerLimit, upperLimit, primeNumber As Integer
Dim isPrime As Boolean = False
lowerLimit = CType(TextBox1.Text, Integer)
upperLimit = CType(TextBox2.Text, Integer)
While lowerLimit < upperLimit
[Code] .....

## Make A Prime Number Generator In A Windows Forms Application?

Jan 4, 2010

How do you make a prime number generator in a windows forms application

## Create Another Six Textboxes / Same Time Allocate These Numbers In Ascending / Descending Numbers.

Jun 21, 2010

I have six textboxes, and upon button press it randomly generates six numbers, one in eact text box e.g. [43] [85] [93] [1] [0] [17]..i create another six textboxes and at the same time allocate these numbers in ascending/descending numbers.I am not looking for any codes whatsoever, as i love the challenge of VB.Net.

## Project - Average Numbers, Maximum And Minimum Values, Range Of The Numbers

Apr 7, 2009

Im trying to write a program that will do:

1.The average of the four numbers. This answer will be placed into a text box reserved for that value. This text box cannot be changed by the user.

2.The maximum and minimum values. These will be denoted by changing the color of the largest number green and the smallest number red.

3.The range of the numbers. The range is defined as the difference between the largest and smallest numbers. The range will be placed into its own text box, labeled as such. This text box cannot be changed by the user."

Im using visual studio 2008 and it has to be written in VB

## Use .next (random Numbers) To Randomly Select Something From A List Of Numbers But It Can't Repeat The Number?

Aug 16, 2009

So how would I use .next (random numbers) to randomly select something from a list of numbers but it can't repeat the number?I could do:

dim num as integer
dim r as new random
num = r.next(1,5)
if num = 1 then
elseif num = 2 then
etc.

That wouldn't work because it would repeat.If I donwload someone's game can I disect it in VS? :0 I tried going to open project, then I went to the folder and clicked open. It brought me inside of the folder so I tried to open the game but there is no form1 there. It says the games name then .exe in the explorer-like thing in the top right?Also, how would I have a value or something in a label and access it from a button.

Example:This is in a label.

Dim number as Integer
number = 0

Then in the button do

Label.number = 0

How would I do something like that? I want to use that a lot as I did in a different language.

## User To Input Numbers From An Inputbox And It Displays The Total Numbers Entered?

Mar 18, 2011

I have a program that allows a user to input numbers from an inputbox and it displays the Total numbers entered, the sum of the numbers entered, and the average of the numbers entered. What I can not seem to find it how to have it display the largest number entered. The code I have so far is,

[Code]...

## VS 2008 - Add Two Excel Sheets With Numbers And The Equal (similar) Numbers To Save Once

Mar 28, 2010

how can i add two excel sheets with numbers and the equal (similar)numbers to save once

## Box - Conversion Error - User Enters 6 Numbers In 6 Different Text Boxes - Displays The Larger Of Those 6 Numbers

Oct 4, 2011

I am making a program, where the user enters 6 numbers in 6 different text boxes, and it displays the larger of those 6 numbers. But I also want to make it where if the user enters a string value (like S for instance) in the text boxes, it gives an message and says "please enter the numbers again" and the user gets to enter the 6 numbers again. But when I do try to do that, it gives an error message saying conversion from "w/e the user entered" to Double is not valid. If the user just enters the numbers, it works fine. However, I am trying to make it if the user does enter non numeric value, it gives a message window and the user can reenter the numbers again.

Here is my code Example

CODE:

This is where I am trying to use IsNumeric to show a message if a user does not enter a string so the user can renter the numbers again, but when the user does enter a string value (say in textbox 1) it gives me an error message saying conversion from "S" to 'double' is not valid.

CODE:

Then right here this is where I have my series of ifs statements, this part works fine, it displays the largest numbers of the 6 textboxes every time. Error free.

CODE:

And do this with variable number 2, 3, 4, 5.

I know there are easier ways to do these with arrays and stuff. But I am not there yet. I am still learning about ifs and stuff.

## Program To Randomly Select Numbers For A Bingo Caller - Prevent Reversed Numbers Being Selected

Mar 6, 2011

I have just about completed a .NET project to write a program to randomly select numbers for a Bingo caller. Over the last month or so Ive learned a lot about .NET but heres something that I consider to be odd and maybe one of you guys can offer an opinion.

One of the features of calling Bingo in a small local club is that callers often use little sayings to accompany certain numbers, I expect youve all heard of (say) All the sixes, clickety click for 66 or 5 and 9 the Brighton line for 59 etc. My little program gives an option to incorporate these with a prompt for the caller that can be edited outside of the program. One of these conventional sayings is used when a number is reversed 12 followed by 21 or 45 followed by 54 for example, when the caller might call (say) 1 and 2, one dozen, number 12 And the other way round 2 and 1, twenty one.

So, I programmed in a bit of code to detect this and to over-ride whatever might otherwise have been the quote with And the other way round and set about testing it. Ive been through literally dozens of full 90 calls watching for the occurrence of a reversed number, spent a few hours doing it, and not once has it occurred which is to say the least, unusual.

So, Im wondering about the Rand Function, could it be that it isnt possible for a reversed number to be selected? Just so you know, I randomly pre-select the order of all 90 numbers, I fill each of the 90 elements of an array with a random number first checking that the number selected hasnt already been stored, if it has, I just get the next random number (and check that too of course), but I cant see how that could prevent reversed numbers being selected, especially in light of the fact that frequently it's not the 'next' number that's used.

## Generate Automatic Numbers For Order Number And Inquiry Numbers?

Feb 15, 2012

am writing an system application for a company that must generate inquiry id and order id automatically. Whenever a customer makes a new inquiry or new order by clicking the add button, an automatic number should be displayed in the text box and when it's saved, it should be saved in the database access.

## Sort Strings With Numbers When Want Numbers Sorted Based On Their Dimension?

Nov 9, 2010

How do you sort strings with numbers when you want numbers sorted based on their dimension?

## Arranging Numbers - Get Equal Numbers And ELSE Giving All Series?

Dec 26, 2010

Sub five()
Dim i As Integer
For i = 1 To 14[code].....

I want the numbers that I was comparing similar numbers. I get equal numbers and ELSE giving all series.I like numbers 2 4 6 8 9 10