[Solved] What is the output of this code?object obj = 42; if (obj is int n) { Console.WriteLine(n + 10); } else { Console.WriteLine("Not an int"); } | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

What is the output of this code?

object obj = 42;
if (obj is int n)
{
    Console.WriteLine(n + 10);
}
else
{
    Console.WriteLine("Not an int");
}

ANot an int

B52

C42

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Check the type of obj
obj holds the integer 42, so obj is int n is true and assigns 42 to n.
Step 2: Calculate the output inside the if block
It prints n + 10 which is 42 + 10 = 52.
Final Answer:
52 -> Option B
Quick Check:
Type check passes, output is 42 + 10 = 52 [OK]

Quick Trick: If type matches, variable holds value for use [OK]

Common Mistakes:

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