[Solved] What will be the output of the following Swift code?let x: Int? = 5 let y: Int? = nil if let a = x, let b = y { print(a + b) } else { print("Failed to unwrap") } | Swift

Swift - Optionals

What will be the output of the following Swift code?

let x: Int? = 5
let y: Int? = nil

if let a = x, let b = y {
    print(a + b)
} else {
    print("Failed to unwrap")
}

AFailed to unwrap

BRuntime error

C10

D0

Step-by-Step Solution

Solution:

Step 1: Check values of optionals
Variable x has value 5, but y is nil.
Step 2: Evaluate multiple optional binding condition
Since y is nil, the if let fails and the else block runs.
Final Answer:
Failed to unwrap -> Option A
Quick Check:
Any nil optional skips the if block [OK]

Quick Trick: If any optional is nil, else block runs [OK]

Common Mistakes:

Master "Optionals" in Swift

9 interactive learning modes - each teaches the same concept differently

More Swift Quizzes

What will be the output of the following Swift code?