Char::IsDigit Method (Char)


Indicates whether the specified Unicode character is categorized as a decimal digit.

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

static bool IsDigit(
	wchar_t c


Type: System::Char

The Unicode character to evaluate.

Return Value

Type: System::Boolean

true if c is a decimal digit; otherwise, false.

This method determines whether a Char is a radix-10 digit. This contrasts with IsNumber, which determines whether 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.

using namespace System;
int main()
   char ch = '8';
   Console::WriteLine( Char::IsDigit( ch ) ); // Output: "True"
   Console::WriteLine( Char::IsDigit(  "sample string", 7 ) ); // Output: "False"

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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