[Solved] Identify the error in this code snippet:class House { var owner: String? } var house: House? = House() print(house.owner?.count) | Swift

Swift - Optionals

Identify the error in this code snippet:

class House {
  var owner: String?
}

var house: House? = House()
print(house.owner?.count)

Aowner is optional, so optional chaining is needed on owner

BMissing optional chaining on house variable

CCannot use optional chaining on count property

DNo error, code is correct

Step-by-Step Solution

Solution:

Step 1: Analyze property types
house is optional, so house.owner needs optional chaining as house?.owner.
Step 2: Check optional chaining on nested optional
owner is optional String, so to access count, optional chaining is needed: house?.owner?.count.
Final Answer:
Missing optional chaining on house variable -> Option B
Quick Check:
Chain optionals at each level [OK]

Quick Trick: Chain ? for each optional level to avoid errors [OK]

Common Mistakes:

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