CODEWITHSUNDEEP
c#
user11837527
user11837527

Reputation:

How to set value type to null in c#?

I'm currently trying to set an int that is null, similar to how strings can be null. I've tried: int i = null; which returns Cannot convert null to 'int' because it is a non-nullable value type but string s = null; Is perfectly fine.

Upvotes: 0

Views: 1706

Answers (3)

nickStouwn
nickStouwn

Reputation: 11

Just add ? to the end of the type

int? nullInt = null;
if (nullInt == null) {
Console.WriteLine("nullInt is null");
}

Upvotes: 1

SagiZiv
SagiZiv

Reputation: 1040

You can use question mark to make it nullable, like that:

int? x = null;
Console.WriteLine(x.Value);

This might help: make nullable reference types in c#

Upvotes: 1

the_legitTDM
the_legitTDM

Reputation: 353

So value types by default can't be set to null, there are however ways to get them to set to null. To solve your issue you would need to do this: int? i = null;

This comes from the Microsoft docs here: https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/nullable-types/

Value Types versus Reference Types can be found here: https://www.tutorialsteacher.com/csharp/csharp-value-type-and-reference-type

Upvotes: 4

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