Data Type VB.Net Tutorial

Public Class Tester
    Public Shared Sub Main
    
        Dim result As New System.Text.StringBuilder
        Dim maxSingle As Single = Single.MaxValue
        Dim maxDouble As Double = Double.MaxValue
        Dim sizeOfSingle As Integer = Runtime.InteropServices.Marshal.SizeOf(maxSingle.GetType)
        Dim sizeOfDouble As Integer = Runtime.InteropServices.Marshal.SizeOf(maxDouble.GetType)
        result.Append("Memory size of a Single (bytes): ")
        result.AppendLine(sizeOfSingle)
        result.Append("Maximum value of a Single: ")
        result.AppendLine(maxSingle)
        result.AppendLine()
        result.Append("Memory size of a Double (bytes): ")
        result.AppendLine(sizeOfDouble)
        result.Append("Maximum value of a Double: ")
        result.AppendLine(maxDouble)
        Console.WriteLine(result.ToString())
     End Sub
End Class
Memory size of a Single (bytes): 4
Maximum value of a Single: 3.402823E+38
Memory size of a Double (bytes): 8
Maximum value of a Double: 1.79769313486232E+308