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Char.IsLetter Method (Char)

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

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

public static bool IsLetter (
	char c
)
public static boolean IsLetter (
	char c
)
public static function IsLetter (
	c : char
) : boolean
Not applicable.

Parameters

c

A Unicode character.

Return Value

true if c is an alphabetic letter; otherwise, false.

Valid letters are members of the following categories in UnicodeCategory: UppercaseLetter, LowercaseLetter, TitlecaseLetter, ModifierLetter, and OtherLetter.

The following code example demonstrates IsLetter.

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
	}
}

import System.*;

public class IsLetterSample
{
    public static void main(String[] args)
    {
        char ch = '8';
      
        Console.WriteLine(Char.IsLetter(ch));                    // False
        Console.WriteLine(Char.IsLetter("sample string", 7));    // True
    } //main
} //IsLetterSample

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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