How to Use the Null Coalescing Operator (??) in C# ?

Published on April 6, 2014 by Senthil Kumar

Filed under C#

Last modified April 6, 2014

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There are times when you simply want to check if the value is null and perform some steps based on the condition . The Null Coalescing Operator (??) can help you achieve this.

How to Use the Null Coalescing Operator (??) in C# ?

Below is a sample code that uses Null Coalescing Operator (??) in C# to find if the vaklue is null . If it is null , then a value of -1 is assigned .

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ACSampleCode
    class Program
        static void Main(string[] args)
            int ? input = null;
            int retValue = input ?? -1;



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