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Char.IsPunctuation Method (String, Int32)

.NET Framework 1.1

Indicates whether the character at the specified position in a specified string is categorized as a punctuation mark.

[Visual Basic]
Overloads Public Shared Function IsPunctuation( _
   ByVal s As String, _
   ByVal index As Integer _
) As Boolean
public static bool IsPunctuation(
 string s,
 int index
public: static bool IsPunctuation(
 String* s,
 int index
public static function IsPunctuation(
   s : String,
 index : int
) : Boolean;


A string.
The character position in s.

Return Value

true if the character at position index in s is a punctuation mark; otherwise, false.


Exception Type Condition
ArgumentNullException s is a null reference (Nothing in Visual Basic).
ArgumentOutOfRangeException index is less than zero or greater than the last position in s.


Character positions in a string are indexed starting from zero.

Valid punctuation marks are members of the following categories in UnicodeCategory: ConnectorPunctuation, DashPunctuation, OpenPunctuation, ClosePunctuation, InititalQuotePunctuation, FinalQuotePunctuation, or OtherPunctuation.


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

[Visual Basic] 
Imports System

Module IsPunctuationSample

    Sub Main()

        Dim ch As Char
        ch = "."c

        Console.WriteLine(Char.IsPunctuation(ch))                   ' Output: "True"
        Console.WriteLine(Char.IsPunctuation("no punctuation", 3))  ' Output: "False"

    End Sub

End Module

using System;

public class IsPunctuationSample {
    public static void Main() {
        char ch = '.';

        Console.WriteLine(Char.IsPunctuation(ch));                        // Output: "True"
        Console.WriteLine(Char.IsPunctuation("no punctuation", 3));        // Output: "False"

#using <mscorlib.dll>
using namespace System;

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

   Console::WriteLine(Char::IsPunctuation(ch));                    // Output: "True"
   Console::WriteLine(Char::IsPunctuation("no punctuation", 3));   // Output: "False"

[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.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Common Language Infrastructure (CLI) Standard

See Also

Char Structure | Char Members | System Namespace | Char.IsPunctuation Overload List | Boolean | String