Learn Vbnet - 10 Code Examples & CST Typing Practice Test

VB.NET (Visual Basic .NET) is an object-oriented, event-driven programming language on the .NET platform. It is designed for rapid application development, supporting Windows applications, web services, desktop apps, and enterprise software. It emphasizes readability and simplicity while leveraging the full .NET framework.

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VB.NET Counter and Theme Toggle VB.NET Simple Calculator VB.NET Factorial VB.NET Fibonacci Sequence VB.NET Array Comprehension VB.NET Dictionary Filtering VB.NET Anonymous Functions VB.NET Sum of Array VB.NET Zip Arrays VB.NET Tuple Destructuring

Learn VBNET with Real Code Examples

Updated Nov 19, 2025

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Code Sample Descriptions

VB.NET Counter and Theme Toggle

Module Program
    Dim count As Integer = 0
    Dim isDark As Boolean = False

    Sub UpdateUI()
        Console.WriteLine($"Counter: {count}")
        Console.WriteLine($"Theme: {(If(isDark, "Dark", "Light"))}")
    End Sub

    Sub Increment()
        count += 1
        UpdateUI()
    End Sub

    Sub Decrement()
        count -= 1
        UpdateUI()
    End Sub

    Sub ResetCounter()
        count = 0
        UpdateUI()
    End Sub

    Sub ToggleTheme()
        isDark = Not isDark
        UpdateUI()
    End Sub

    Sub Main()
        ' Simulate actions
        UpdateUI()
        Increment()
        Increment()
        ToggleTheme()
        Decrement()
        ResetCounter()
    End Sub
End Module

Demonstrates a simple counter with theme toggling using VB.NET variables and console output.

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VB.NET Simple Calculator

Module Program
    Function Add(a As Integer, b As Integer) As Integer
        Return a + b
    End Function

    Function Subtract(a As Integer, b As Integer) As Integer
        Return a - b
    End Function

    Function Multiply(a As Integer, b As Integer) As Integer
        Return a * b
    End Function

    Function Divide(a As Integer, b As Integer) As Integer
        Return a  b
    End Function

    Sub Main()
        Console.WriteLine($"Add 5 + 3: {Add(5,3)}")
        Console.WriteLine($"Subtract 5 - 3: {Subtract(5,3)}")
        Console.WriteLine($"Multiply 5 * 3: {Multiply(5,3)}")
        Console.WriteLine($"Divide 6 / 2: {Divide(6,2)}")
    End Sub
End Module

Basic arithmetic operations using VB.NET functions.

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VB.NET Factorial

Module Program
    Function Factorial(n As Integer) As Integer
        If n <= 1 Then
        Return 1
        Else
        Return n * Factorial(n - 1)
        End If
    End Function

    Sub Main()
        Console.WriteLine($"Factorial of 5: {Factorial(5)}")
    End Sub
End Module

Recursive factorial function.

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VB.NET Fibonacci Sequence

Module Program
    Function Fibonacci(n As Integer) As Integer
        If n = 0 Then Return 0
        If n = 1 Then Return 1
        Return Fibonacci(n-1) + Fibonacci(n-2)
    End Function

    Sub Main()
        For i As Integer = 0 To 9
        Console.WriteLine(Fibonacci(i))
        Next
    End Sub
End Module

Recursive Fibonacci sequence generator.

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VB.NET Array Comprehension

Module Program
    Sub Main()
        Dim numbers = Enumerable.Range(1,10).ToArray()
        Dim squares = numbers.Where(Function(n) n Mod 2 = 0).Select(Function(n) n * n).ToArray()
        Console.WriteLine(String.Join(",", squares))
    End Sub
End Module

Square even numbers using array operations.

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VB.NET Dictionary Filtering

Module Program
    Sub Main()
        Dim scores As New Dictionary(Of String, Integer) From {
        {"Alice",10}, {"Bob",5}, {"Charlie",12}
        }
        Dim highScores = scores.Where(Function(kv) kv.Value >= 10).ToDictionary(Function(kv) kv.Key, Function(kv) kv.Value)
        For Each kv In highScores
        Console.WriteLine($"{kv.Key}: {kv.Value}")
        Next
    End Sub
End Module

Filter dictionary based on values.

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VB.NET Anonymous Functions

Module Program
    Sub Main()
        Dim add = Function(x As Integer, y As Integer) x + y
        Console.WriteLine(add(3,7))
    End Sub
End Module

Using lambda expressions.

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VB.NET Sum of Array

Module Program
    Sub Main()
        Dim numbers = {1,2,3,4,5}
        Dim sum = numbers.Sum()
        Console.WriteLine(sum)
    End Sub
End Module

Sum elements of an array using LINQ.

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VB.NET Zip Arrays

Module Program
    Sub Main()
        Dim arr1 = {1,2,3}
        Dim arr2 = {4,5,6}
        Dim sums = arr1.Zip(arr2, Function(a,b) a+b).ToArray()
        Console.WriteLine(String.Join(",", sums))
    End Sub
End Module

Combine two arrays element-wise using LINQ.

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VB.NET Tuple Destructuring

Module Program
    Sub Main()
        Dim pair = Tuple.Create(3,7)
        Dim (x,y) = pair
        Console.WriteLine(x + y)
    End Sub
End Module

Destructuring a tuple and summing the elements.

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Frequently Asked Questions about Vbnet

What is Vbnet?

What are the primary use cases for Vbnet?

Windows desktop applications (WinForms, WPF). ASP.NET web applications. Enterprise internal tools. Automated business logic & workflows. Integration with SQL Server & other databases. .NET libraries and API development

What are the strengths of Vbnet?

Easy to read and learn for beginners. Rapid development of Windows GUI apps. Full access to .NET libraries. Strong tooling support (Visual Studio). Backwards compatibility with older VB code

What are the limitations of Vbnet?

Windows-centric (less cross-platform than C#). Slower adoption in modern cloud-native apps. Smaller community compared to C#. Less support in newer frameworks like .NET MAUI. Verbose syntax in some scenarios

How can I practice Vbnet typing speed?

CodeSpeedTest offers 10+ real Vbnet code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Learn Vbnet - 10 Code Examples & CST Typing Practice Test

Code Sample Descriptions

VB.NET Counter and Theme Toggle

Module Program
    Dim count As Integer = 0
    Dim isDark As Boolean = False

    Sub UpdateUI()
        Console.WriteLine($"Counter: {count}")
        Console.WriteLine($"Theme: {(If(isDark, "Dark", "Light"))}")
    End Sub

    Sub Increment()
        count += 1
        UpdateUI()
    End Sub

    Sub Decrement()
        count -= 1
        UpdateUI()
    End Sub

    Sub ResetCounter()
        count = 0
        UpdateUI()
    End Sub

    Sub ToggleTheme()
        isDark = Not isDark
        UpdateUI()
    End Sub

    Sub Main()
        ' Simulate actions
        UpdateUI()
        Increment()
        Increment()
        ToggleTheme()
        Decrement()
        ResetCounter()
    End Sub
End Module

Demonstrates a simple counter with theme toggling using VB.NET variables and console output.

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VB.NET Simple Calculator

Module Program
    Function Add(a As Integer, b As Integer) As Integer
        Return a + b
    End Function

    Function Subtract(a As Integer, b As Integer) As Integer
        Return a - b
    End Function

    Function Multiply(a As Integer, b As Integer) As Integer
        Return a * b
    End Function

    Function Divide(a As Integer, b As Integer) As Integer
        Return a  b
    End Function

    Sub Main()
        Console.WriteLine($"Add 5 + 3: {Add(5,3)}")
        Console.WriteLine($"Subtract 5 - 3: {Subtract(5,3)}")
        Console.WriteLine($"Multiply 5 * 3: {Multiply(5,3)}")
        Console.WriteLine($"Divide 6 / 2: {Divide(6,2)}")
    End Sub
End Module

Basic arithmetic operations using VB.NET functions.

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VB.NET Factorial

Module Program
    Function Factorial(n As Integer) As Integer
        If n <= 1 Then
        Return 1
        Else
        Return n * Factorial(n - 1)
        End If
    End Function

    Sub Main()
        Console.WriteLine($"Factorial of 5: {Factorial(5)}")
    End Sub
End Module

Recursive factorial function.

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VB.NET Fibonacci Sequence

Module Program
    Function Fibonacci(n As Integer) As Integer
        If n = 0 Then Return 0
        If n = 1 Then Return 1
        Return Fibonacci(n-1) + Fibonacci(n-2)
    End Function

    Sub Main()
        For i As Integer = 0 To 9
        Console.WriteLine(Fibonacci(i))
        Next
    End Sub
End Module

Recursive Fibonacci sequence generator.

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VB.NET Array Comprehension

Module Program
    Sub Main()
        Dim numbers = Enumerable.Range(1,10).ToArray()
        Dim squares = numbers.Where(Function(n) n Mod 2 = 0).Select(Function(n) n * n).ToArray()
        Console.WriteLine(String.Join(",", squares))
    End Sub
End Module

Square even numbers using array operations.

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VB.NET Dictionary Filtering

Module Program
    Sub Main()
        Dim scores As New Dictionary(Of String, Integer) From {
        {"Alice",10}, {"Bob",5}, {"Charlie",12}
        }
        Dim highScores = scores.Where(Function(kv) kv.Value >= 10).ToDictionary(Function(kv) kv.Key, Function(kv) kv.Value)
        For Each kv In highScores
        Console.WriteLine($"{kv.Key}: {kv.Value}")
        Next
    End Sub
End Module

Filter dictionary based on values.

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VB.NET Anonymous Functions

Module Program
    Sub Main()
        Dim add = Function(x As Integer, y As Integer) x + y
        Console.WriteLine(add(3,7))
    End Sub
End Module

Using lambda expressions.

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VB.NET Sum of Array

Module Program
    Sub Main()
        Dim numbers = {1,2,3,4,5}
        Dim sum = numbers.Sum()
        Console.WriteLine(sum)
    End Sub
End Module

Sum elements of an array using LINQ.

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VB.NET Zip Arrays

Module Program
    Sub Main()
        Dim arr1 = {1,2,3}
        Dim arr2 = {4,5,6}
        Dim sums = arr1.Zip(arr2, Function(a,b) a+b).ToArray()
        Console.WriteLine(String.Join(",", sums))
    End Sub
End Module

Combine two arrays element-wise using LINQ.

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VB.NET Tuple Destructuring

Module Program
    Sub Main()
        Dim pair = Tuple.Create(3,7)
        Dim (x,y) = pair
        Console.WriteLine(x + y)
    End Sub
End Module

Destructuring a tuple and summing the elements.

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Frequently Asked Questions about Vbnet

What is Vbnet?

What are the primary use cases for Vbnet?

What are the strengths of Vbnet?

Easy to read and learn for beginners. Rapid development of Windows GUI apps. Full access to .NET libraries. Strong tooling support (Visual Studio). Backwards compatibility with older VB code

What are the limitations of Vbnet?

How can I practice Vbnet typing speed?

CodeSpeedTest offers 10+ real Vbnet code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.