VB.net Data Type with Example – Available Data Types in VB.net

VB.net Data Type

VB.net Data Type is a complex mechanism for defining variables and operations of various types.

The type of a variable dictates how much storage space it takes up and how the stored bit pattern is interpreted.

The Data Type in VB.NET is used to specify the type of a variable or function in a program. Furthermore, the data conversion function is used to convert one data type to another.

A Data Sort specifies the type of data or value that should be assigned to a variable or function in order for it to carry a specific data type value.

When we declare a variable, for example, we must inform the compiler what sort of data or value is assigned to different types of variables in order for them to hold different amounts of memory in the computer.

Available Data Types in VB.net

VB.net provides a wide range of data types. The following table shows all the data types available in vb.net.

VB.net Types Example

The following example demonstrates the use of some of the VB.net types.

Module Data_type  
    Sub Main()  
' defining the Data Type to the variables  
        Dim b As Byte = 1  
        Dim num As Integer = 5  
        Dim si As Single  
        Dim db As Double  
        Dim get_date As Date  
        Dim c As Char  
        Dim str As String  
  
        b = 1  
        num = 20  
        si = 0.12  
        db = 2131.787  
        get_date = Today  
        c = "A"  
        str = "Hello IT SOURCECODERS..."  
  
        Console.WriteLine("Welcome to the IT SOURCECODE")  
        Console.WriteLine("Byte is: {0}", b)  
        Console.WriteLine("Integer number is: {0}", num)  
        Console.WriteLine("Single data type is: {0}", si)  
        Console.WriteLine("Double data type is: {0}", db)  
        Console.WriteLine("Today is: {0}", get_date)  
        Console.WriteLine("Character is: {0}", b)  
        Console.WriteLine("String message is: {0}", str)  
        Console.ReadKey()  
    End Sub  
End Module  

When the above code is compiled and executed, it produces the following result.

Welcome to the IT SOURCECODE
Byte is: 1
Integer number is: 20
Single data type is: 0.12
Double data type is: 2131.787
Today is: 6/20/2022 12:00:00 AM
Character is: 1
String message is: Hello IT SOURCECODERS…

You can test the above example here! ➡ VB.net Online Compiler

The Type Conversion Functions in VB.net

VB.net provides the following in-line type conversion functions.

VB.net Functions Example

The following example demonstrates some of these functions.

Module DataTypes
   Sub Main()
      Dim n As Integer
      Dim da As Date
      Dim bl As Boolean = True
      n = 1234567
      da = Today
      
      Console.WriteLine(bl)
      Console.WriteLine(CSByte(bl))
      Console.WriteLine(CStr(bl))
      Console.WriteLine(CStr(da))
      Console.WriteLine(CChar(CChar(CStr(n))))
      Console.WriteLine(CChar(CStr(da)))
      Console.ReadKey()
   End Sub
End Module

When the above code is compiled and executed, it produces the following result.

True
-1
True
6/20/2022
1
6

You can test the above example here! ➡ VB.net Online Compiler

Summary

Each variable must belong to a data type. The data type determines the amount of memory space allocated to the variable.

We can convert a variable from one data type to another.

Initializing variables means assigning values to the variables. We create a console application to help us get input from the users via the console using the ReadLine function.

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Common use cases for VB.net Data Type with Example – Available Data Types

VB.net Data Type with Example – Available Data Types shows up frequently in production VB.NET codebases. The most common patterns:

• Business logic layer. Encapsulate rules and workflows separate from the UI.
• Data access patterns. Bridge between UI events and database operations cleanly.
• Utility helpers. Reusable methods for string processing, date arithmetic, or format conversion.
• Integration with .NET libraries. Interoperate with System.IO, System.Net, System.Text.RegularExpressions, and more.
• Legacy migration. Modernize VB6 code by wrapping old logic in idiomatic VB.NET constructs.

Working code example

Public Module Program

    Public Sub Main(args As String())
        ' Practical demonstration of VB.net Data Type with Example - Available Data Types
        Dim result As String = ProcessData("sample input")
        Console.WriteLine("Result: " & result)
        Console.ReadKey()
    End Sub

    Private Function ProcessData(input As String) As String
        If String.IsNullOrWhiteSpace(input) Then
            Return "empty"
        End If
        Return input.ToUpper()
    End Function

End Module

Best practices when working with VB.net Data Type with Example – Available Data Types

• Explicit typing. Enable Option Strict On at the project level to force compile-time type checking.
• Namespace hygiene. Group related types under project-specific namespaces to avoid conflicts with .NET Framework types.
• Consistent naming. Follow Microsoft’s VB.NET style guide: PascalCase for public members, camelCase for locals.
• Error handling with Try/Catch. Prefer specific exception types over catch-all Exception blocks.
• Modern language features. Use string interpolation, LINQ, and Async/Await where they clarify intent.

Common pitfalls

• Late binding. Without Option Strict, VB.NET falls back to late-binding, hiding bugs until runtime.
• Nothing vs empty string. String.IsNullOrEmpty and String.IsNullOrWhiteSpace catch both cases; avoid checking IsNothing alone.
• Integer overflow. Use Long or Decimal for arithmetic that may exceed Int32.MaxValue.
• Date parsing across cultures. Always pass CultureInfo.InvariantCulture when serializing dates for storage.

Angel Jude Suarez

Full-Stack Developer at PIES IT Solution

Focuses on Python development, machine learning, and AI integration. Has built production AI systems including OpenAI Whisper integration for medical transcription and GPT-4o-powered diagnosis assistance. Strong background in pandas, scikit-learn, and TensorFlow.

Expertise: Python · PHP · Java · VB.NET · ASP.NET · Machine Learning · AI Integration · OpenCV · Django · CodeIgniter
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