Updated: October 2008
Indicates whether the specified Unicode character is categorized as a decimal digit.
Namespace:
System
Assembly:
mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function IsDigit ( _
c As Char _
) As Boolean
Dim c As Char
Dim returnValue As Boolean
returnValue = Char.IsDigit(c)
public static bool IsDigit(
char c
)
public:
static bool IsDigit(
wchar_t c
)
public static function IsDigit(
c : char
) : boolean
This method determines if a Char is a radix-10 digit. This contrasts with the IsNumber method, which determines if a Char is of any numeric Unicode category. Numbers include characters such as fractions, subscripts, superscripts, Roman numerals, currency numerators, encircled numbers, and script-specific digits.
Valid digits are members of the UnicodeCategory..::.DecimalDigitNumber category.
The following code example demonstrates IsDigit.
Imports System
Module IsDigitSample
Sub Main()
Dim ch8 As Char
ch8 = "8"c
Console.WriteLine(Char.IsDigit(ch8)) ' Output: "True"
Console.WriteLine(Char.IsDigit("sample string", 6)) ' Output: "False"
End Sub
End Module
using System;
public class IsDigitSample {
public static void Main() {
char ch = '8';
Console.WriteLine(Char.IsDigit(ch)); // Output: "True"
Console.WriteLine(Char.IsDigit("sample string", 7)); // Output: "False"
}
}
using namespace System;
int main()
{
char ch = '8';
Console::WriteLine( Char::IsDigit( ch ) ); // Output: "True"
Console::WriteLine( Char::IsDigit( "sample string", 7 ) ); // Output: "False"
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
XNA Framework
Supported in: 3.0, 2.0, 1.0
Reference
Date | History | Reason |
|---|
October 2008
| Added detail about the difference between the IsDigit and IsNumber methods. |
Customer feedback.
|