[Solved] Find the mistake in this Swift code:let a: Int? = 5 let b: Int? = 6 if let a = a, let b = b { print(a + b) } else { print("Error") } | Swift

Swift - Optionals

Find the mistake in this Swift code:

let a: Int? = 5
let b: Int? = 6
if let a = a, let b = b {
    print(a + b)
} else {
    print("Error")
}

AVariable names in binding shadow original optionals, causing confusion.

BMissing unwrap operator (!) after optionals.

CUsing let instead of var in optional binding.

DNo mistake; code runs correctly.

Step-by-Step Solution

Solution:

Step 1: Analyze variable shadowing
Shadowing is allowed and common in optional binding to unwrap values.
Step 2: Check syntax and logic
Code correctly unwraps optionals and prints sum.
Final Answer:
No mistake; code runs correctly. -> Option D
Quick Check:
Shadowing in optional binding is valid [OK]

Quick Trick: Shadowing is normal in optional binding [OK]

Common Mistakes:

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