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Char.IsLetter Method

Indicates whether a Unicode character is categorized as an alphabetic letter.

Overload List

Indicates whether the specified Unicode character is categorized as an alphabetic letter.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function IsLetter(Char) As Boolean
[C#] public static bool IsLetter(char);
[C++] public: static bool IsLetter(__wchar_t);
[JScript] public static function IsLetter(Char) : Boolean;

Indicates whether the character at the specified position in a specified string is categorized as an alphabetic character.

[Visual Basic] Overloads Public Shared Function IsLetter(String, Integer) As Boolean
[C#] public static bool IsLetter(string, int);
[C++] public: static bool IsLetter(String*, int);
[JScript] public static function IsLetter(String, int) : Boolean;


[Visual Basic, C#, C++] The following sample demonstrates IsLetter.

[Visual Basic, C#, C++] Note   This example shows how to use one of the overloaded versions of IsLetter. For other examples that might be available, see the individual overload topics.
[Visual Basic] 
Imports System

Module IsLetterSample

    Sub Main()

        Dim ch8 As Char
        ch8 = "8"c

        Console.WriteLine(Char.IsLetter(ch8))                   ' Output: "False"
        Console.WriteLine(Char.IsLetter("sample string", 5))    ' Output: "True"

    End Sub

End Module

using System;

public class IsLetterSample {
    public static void Main() {
        char ch = '8';

        Console.WriteLine(Char.IsLetter(ch));                    // False
        Console.WriteLine(Char.IsLetter("sample string", 7));    // True

#using <mscorlib.dll>
using namespace System;

int main() {
   char ch = '8';

   Console::WriteLine(Char::IsLetter(ch));                  // False
   Console::WriteLine(Char::IsLetter("sample string", 7));  // True

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

See Also

Char Structure | Char Members | System Namespace