Declare a nullable type by adding the ? type modifier in a value type declaration. : Nulllable « Data Types « C# / C Sharp

1.	2D Graphics
2.	Class Interface
3.	Collections Data Structure
4.	Components
5.	Data Types
6.	Database ADO.net
7.	Design Patterns
8.	Development Class
9.	Event
10.	File Stream
11.	Generics
12.	GUI Windows Form
13.	Language Basics
14.	LINQ
15.	Network
16.	Office
17.	Reflection
18.	Regular Expressions
19.	Security
20.	Services Event
21.	Thread
22.	Web Services
23.	Windows
24.	Windows Presentation Foundation
25.	XML
26.	XML LINQ

C# / C Sharp by API

C# / CSharp Tutorial

C# / CSharp Open Source

C# / C Sharp » Data Types » Nulllable

Screenshots

Declare a nullable type by adding the ? type modifier in a value type declaration.

  



using System;

public class MainClass {

    double? variable1 = null;



    static void Main() {

        int? variablea = null;

        Console.WriteLine(variablea.HasValue); // false

        int variableb = variablea ?? 5;

        Console.WriteLine(variableb); // 5

    }

}

Related examples in the same category

1.	Nullable variable
2.	Nullable bool Types
3.	Nullable int Types
4.	Nulllable HasValue
5.	Is it Nullable
6.	Nullable extension: Has Value And Equals

www.java2java.com | Contact Us

All other trademarks are property of their respective owners.