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Categories / C# / Data Types

 

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     } }