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].....
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]...
View 7 RepliesI 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]
View 2 RepliesI 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
ListBox1.Items.Add(x)
End If
Next
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]....
[URL]
Each set of ( 1 million ) prime numbers is in a ZIP file just click on say 1st Million
on the left to download a list as a ZIP file.
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]
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.
View 1 RepliesI'm having a serious brain fart over this but I need a looping statement that will display all prime number from 6 to 10000.
View 3 Repliesi need a prime numbers in console application in vb.net
View 1 RepliesJust 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))
Simple Program for Prime numbers stumped?
View 1 RepliesFirst 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]...
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.
View 3 RepliesI am creating an application that takes two numbers (lower and upper) and determines the prime numbers
Public Class primeNumber
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?
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].....
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]...
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] .....
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]...
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.
I am making a application that you enter 3 number one for length, width, and height of a rectangle.It needs to display a picture showing all three.i am using windows form application to do this wil three text boxes to enter the numbers.
View 3 Replieshow to make the values in a text box accepts only letters in the text box for data that are for letters only and numbers for data requiring numbers only
View 7 Replies[code]How i can make The Program to find Numbers On Form and Do That without making So Many "Same" Codes?Its Pretty Annoying To Make Big Program nad only Copying and Pasting Text.
View 3 RepliesSomething ive wondered about as long as ive had an interest in making apps is generating serial numbers for software projects.Im wondering how is this done by the pro's so that someone can put a key into an app and without being connected to the net it knows the key is valid by using an algorythm.Id like to make something like that for the sake of learning how. I realise more and more programs now "call home" at the point of entering a key or to "activate" as with MS office and windows etc, but id like to start at the old school way of doing it.Generating the alpha numeric keys and also checking them.
View 10 RepliesI have an assignment that includes some extra credit point by making a calculate button take four numbers, add them together and give a commission. I know what I did works, but I just want to make sure I'm doing it right! Let me know if I did something wrong
[code]Private Sub calculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculateButton.Click
[Code]...
im making a calculator with multiple function but im stuck on two main parts on it. i wrote a big chunk of code for the total calculator. it adds, sub., multi., or divide the amount of numbers the user puts in and then it ask them to enter them in individually using a loops, radio buttons and a listbox. im stuck on the loop because it will as for the 1st number and the last number heres the [code]......
View 5 RepliesI am having trouble making a function that reorders the text put into a textbox. I then have to get that reordered data and put it into a list box.
Basically, 2 words separated by a comma are entered into a text box (say Wash, Car is put into the text box), then I need to get a function that reorders that string and be able to put in into a listbox that shows Car Wash. So it gets the word after the comma first, then gets the word before the comma. It should do this with every string.
Need to use a function for this.
Right now I really just have
Dim Word As String
Word = textbox1.text
'Then the function to reorder the name and return the reordered name will go right here
What this is suppose to do?
- Example, some puts Wash, Car into textbox 1. List Box 1 will display Wash Car.
- Basic, Visual in textbox1, list box 1 will display Visual basic
i have search for tutorials but none seems to work for me.This is my app code Public Class Form1 Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]...
As you see, "button2" renames files to backup, and "button3" renames them back to original name.How can i make dir (C:Program FilesRockstar GamesGTA San Andreas) a variable?And maybe when app starts it lets user to select their program path (browse function) then it will but their selected path to variable, and i can use this variable in my code as path?
Then you have to take that same range and find the product of all odd numbers between said sequence. I figured out how to find the product but only if the lowest number is also an odd number. For example, if I put in the values 1 and 7 the product is 105 which is correct. But if I put in 2 and 5 the product somehow becomes 10, when it should be 15.I have to use the MOD function to distinguish between even and odd numbers, which I know how to do however it's still not working out correctly for some reason and I'm completely stuck. This is the part I'm having trouble with. Go down for full source)
For counter = intX To intB
intX = intProduct
If intY Mod 2 = 0 Then
[code].....
I'm trying to write a program that allows the user to enter 10 numbers into an input box and then the program will use a function to calculate the average of those numbers. I'm really illiterate when it comes to Visual Basic.
View 2 RepliesI am making a calculator that accepts large number (represented as strings) and performs basic math functions on them. So far I have Add and Multiply figured out.
Here is addition
Private Function Add(ByVal Number1 As String, ByVal Number2 As String) As String
Dim num1, num2, r, total As New Integer
Dim sum As String = ""
[Code].....
I saw something like this in the code bank but the examples there were from VB6(?) and were hugely inefficient (compared his Add and Multiply examples to mine, his having way more code and loops.)