VB.Net/Language Basics/Char

Char IsDigit

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is digit: " & Char.IsDigit("aaa") )
  End Sub " Main
End Class

Char IsLetter

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is letter: " & Char.IsLetter("aaa") )
  End Sub " Main
End Class

Char IsLetterOrDigit

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is letter or digit: " & Char.IsLetterOrDigit("aaa") )
  End Sub " Main
End Class

Char IsLower

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is lower case: " & Char.IsLower("aaa") )
  End Sub " Main
End Class

Char IsPunctuation

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is punctuation: " & Char.IsPunctuation("aaa") )
  End Sub " Main
End Class

Char IsSymbol

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is symbol: " & Char.IsSymbol("aaa"))
  End Sub " Main
End Class

Char IsUpper

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("is upper case: " & Char.IsUpper("aaa") )
  End Sub " Main
End Class

Char ToLower

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("to lower case: " & Char.ToLower("aaa") )
  End Sub " Main
End Class

Char ToUpper

Imports System
Public Class MainClass
   Shared Sub Main()
      Console.WriteLine("to upper case: " & Char.ToUpper("aaa") )
  End Sub " Main
End Class

Create a Console Line by Repeating a Char

Imports System

Public Class MainClass
   Shared Sub Main()
        Console.WriteLine(New String("-"c, 100) )
   End Sub 
End Class

Display contents of charArray

Imports System
Public Class MainClass
   Shared Sub Main()
      Dim string1 As String = "hello"
      Dim string2 As String = "GOOD BYE "
      Dim string3 As String = "   spaces   "
      Dim i As Integer
      Dim charArray() As Char = string1.ToCharArray()
      Console.WriteLine("string1 = " & string1 & vbCrLf & "string2 = " & _
         string2 & vbCrLf & "string3 = " & string3)
      For i = 0 To charArray.Length - 1
         Console.WriteLine(charArray(i))
      Next

   End Sub " Main
End Class

Four ways to declare Characters

Public Class MainClass
   Public Shared Sub Main()
        "Character Declarations
        Dim chrLtr_a As Char = "a"c
        Dim chrAsc_a As Char = Chr(97)
        Dim chrAsc_b As Char = ChrW(98)
        Dim bytLtrA As Byte = Asc("a")
        Console.WriteLine(chrLtr_a)
        Console.WriteLine(chrAsc_a)
        Console.WriteLine(chrAsc_b)
        Console.WriteLine(bytLtrA)
   End Sub
End Class