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Char.IsSymbol Method (String, Int32)

.NET Framework 1.1

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

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

Parameters

s
A string.
index
The character position in s.

Return Value

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

Exceptions

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.

Remarks

Character positions in a string are indexed starting from zero.

Valid symbols are members of the following categories in System.Globalization.UnicodeCategory: MathSymbol, CurrencySymbol, ModifierSymbol, and OtherSymbol.

Example

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

[Visual Basic] 
Imports System

Module IsSymbolSample

    Sub Main()

        Dim str As String
        str = "non-symbolic characters"

        Console.WriteLine(Char.IsSymbol("+"c))      ' Output: "True"
        Console.WriteLine(Char.IsSymbol(str, 8))    ' Output: "False"

    End Sub

End Module

[C#] 
using System;

public class IsSymbolSample {
    public static void Main() {
        string str = "non-symbolic characters"; 

        Console.WriteLine(Char.IsSymbol('+'));        // Output: "True"
        Console.WriteLine(Char.IsSymbol(str, 8));    // Output: "False"
    }
}

[C++] 
#using <mscorlib.dll>
using namespace System;

int main() {
   String* str = "non-symbolic characters"; 

   Console::WriteLine(Char::IsSymbol('+'));      // Output: "True"
   Console::WriteLine(Char::IsSymbol(str, 8));   // 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.

Requirements

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.IsSymbol Overload List | Boolean | String

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