What is output from the following code snippet? try { int a = 10; int? b = null; int c = 20; Console.Write(a + (b ?? c)); } catch(Exception) { Console.Write("Error"); }

204.

What is output from the following code snippet?

try
{
   int a = 10;
   int? b = null;
   int c = 20;

Console.Write(a + (b ?? c));
}
catch(Exception)
{
Console.Write("Error");
}

Error

The ?? is a null coalescing operator, if b is null then use c else use b, so for the snippet in the code the sum carried out is actually a + c as b is set to null, if b had a int value then the sum would have been a + b.