Which of the following is the correct way to check for an error in a URLSession data task completion handler?

easy📝 Syntax Q3 of 15

iOS Swift - Networking

Aif let error = error { print(error.localizedDescription) }

Bif error == nil { print(error.localizedDescription) }

Cguard error = nil else { return }

Dif error != nil { return }

Step-by-Step Solution

Solution:

Step 1: Understand optional binding for error
Use if let to safely unwrap the optional error.
Step 2: Check the correct syntax
if let error = error { ... } unwraps error if it exists and allows handling.
Final Answer:
if let error = error { print(error.localizedDescription) } -> Option A
Quick Check:
Optional binding with if let = if let error = error { print(error.localizedDescription) } [OK]

Quick Trick: Use if let to unwrap error optionals safely [OK]

Common Mistakes:

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