MasterMind RRS feed

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  • Hello

    I've just started learning how to code visual basic (.Net FrameWork) and i was wondering how can i create a random number between 0000 and 9999

    i've tried things like number = Int(Rnd() * 9998) for 4 lines of code 


    dim X1 as new random 

    x1 = Int(Rnd() * 9998) 

    i then want to divide it into 4 seperate digits e.g. if x1 is 9876 i want it to show 9,8,7,6 so that i can see if im correct for guessing a number e.g. if my guess was 9772, it'd say 9 was correct and so was 7 

    Is there a way to do that in .Net FrameWork?

    my current code is this

    Module Module1
        Sub Main()
            Dim Difficulty As String
            Console.WriteLine("Welcome to MasterMind")
            Console.WriteLine("Choose between Easy and Hard difficulty")

            Difficulty = Console.ReadLine
            While Difficulty <> "Easy" And Difficulty <> "easy" And Difficulty <> "Hard" And Difficulty <> "hard"
                Console.WriteLine("That's not a correct mode")
                Difficulty = Console.ReadLine
            End While
            If Difficulty = "Easy" Or Difficulty = "easy" Then
            ElseIf Difficulty = "Hard" Or Difficulty = "hard" Then
            End If

        End Sub

        Sub Easy()
            Dim RanNum(0, 1, 2, 3) As ArrayList
            Dim Guess As Integer
            Dim Tries As Integer
            RanNum = ?
            Console.WriteLine("You have chosen the easy difficulty")
            Console.WriteLine("You have to guess a 4 Digit number between 1000 and 9999")
            Console.WriteLine("Enter your guess")
            Guess = Console.ReadLine
            While Guess < 999 And Guess > 10000
                Console.WriteLine("Enter a number between 1000 and 9999")
                Guess = Console.ReadLine
            End While

        End Sub

        Sub Hard()
            Console.WriteLine("You have chosen the hard difficulty")
        End Sub

    End Module

    Saturday, May 18, 2019 5:35 PM

All replies

  • Hi

    The Random number generator is much better than the old Rnd method now. You declare a New Random and use / reuse throughout your code as many times as needed.

    As below, you define the tange needed - such as 1000 to 10000, nut remember, in the method to use the Max needed +1 (it is an inclusive / exclusive type pair)


    Option Strict On
    Option Explicit On
    Public Class Form1
    	Dim rand As New Random
    	Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    		' find a new random number between
    		'  1000 And 10000 NOTE second  
    		'  parameter is max required +1
    		Dim newnumber As Integer = rand.Next(1000, 10001)
    	End Sub
    End Class

    Regards Les, Livingston, Scotland

    • Edited by leshay Saturday, May 18, 2019 6:14 PM
    • Proposed as answer by Alex Li-MSFT Wednesday, May 22, 2019 2:23 AM
    Saturday, May 18, 2019 6:12 PM
  • Hi,

    Do you resolve the issue? If you resolve the issue,  please mark the helpful as answer.

    Best Regards,


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    Wednesday, May 22, 2019 2:25 AM