Char.IsSymbol Method

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Indicates whether a Unicode character is categorized as a symbol character.

Overloads

IsSymbol(String, Int32)	Indicates whether the character at the specified position in a specified string is categorized as a symbol character.
IsSymbol(Char)	Indicates whether the specified Unicode character is categorized as a symbol character.

Examples

The following code example demonstrates IsSymbol.

using namespace System;
int main()
{
   String^ str =  "non-symbolic characters";
   Console::WriteLine( Char::IsSymbol( '+' ) ); // Output: "True"
   Console::WriteLine( Char::IsSymbol( str, 8 ) ); // Output: "False"
}

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"
    }
}

open System

let str = "non-symbolic characters"

printfn $"{Char.IsSymbol '+'}"      // Output: "True"
printfn $"{Char.IsSymbol(str, 8)}"  // Output: "False"

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

Remarks

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

Symbols in the Unicode standard are a loosely defined set of characters that include the following:

• Currency symbols.

• Letterlike symbols, which include a set of mathematical alphanumeric symbols as well as symbols such as ℅, №, and ™.

• Number forms, such as subscripts and superscripts.

• Mathematical operators and arrows.

• Geometric symbols.

• Technical symbols.

• Braille patterns.

• Dingbats.

IsSymbol(String, Int32)

Source:

Char.cs

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

public:
 static bool IsSymbol(System::String ^ s, int index);

public static bool IsSymbol (string s, int index);

static member IsSymbol : string * int -> bool

Public Shared Function IsSymbol (s As String, index As Integer) As Boolean

Parameters

s

String

A string.

index

Int32

The position of the character to evaluate in s.

Returns

Boolean

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

Exceptions

ArgumentNullException

s is null.

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.

Symbols in the Unicode standard are a loosely defined set of characters that include the following:

• Currency symbols.

• Letterlike symbols, which include a set of mathematical alphanumeric symbols as well as symbols such as ℅, №, and ™.

• Number forms, such as subscripts and superscripts.

• Mathematical operators and arrows.

• Geometric symbols.

• Technical symbols.

• Braille patterns.

• Dingbats.

See also

• Boolean
• String

IsSymbol(Char)

Source:

Char.cs

Indicates whether the specified Unicode character is categorized as a symbol character.

public:
 static bool IsSymbol(char c);

public static bool IsSymbol (char c);

static member IsSymbol : char -> bool

Public Shared Function IsSymbol (c As Char) As Boolean

Parameters

c

Char

The Unicode character to evaluate.

Returns

Boolean

true if c is a symbol character; otherwise, false.

Remarks

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

Symbols in the Unicode standard are a loosely defined set of characters that include the following:

• Currency symbols.

• Letterlike symbols, which include a set of mathematical alphanumeric symbols as well as symbols such as ℅, №, and ™.

• Number forms, such as subscripts and superscripts.

• Mathematical operators and arrows.

• Geometric symbols.

• Technical symbols.

• Braille patterns.

• Dingbats.

See also

• IsSymbol(Rune)
• Boolean