[Solved] Consider this Swift code:var number: Int! = nil number = 42 print(number + 8)What is the output? — Ans: 50 | Swift

Swift - Optionals

Consider this Swift code:

var number: Int! = nil
number = 42
print(number + 8)

What is the output?

ARuntime crash

BOptional(50)

C50

DCompile error

Step-by-Step Solution

Solution:

Step 1: Analyze variable initialization and assignment
The IUO number is initially nil but then assigned 42 before use.
Step 2: Calculate the expression
Since number is 42, adding 8 results in 50, which prints without error.
Final Answer:
50 -> Option C
Quick Check:
IUO with value unwraps safely = 50 [OK]

Quick Trick: IUO must have value before use to avoid crash [OK]

Common Mistakes:

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