[Solved] Given the following Swift code, what will be the value of finalValue?func getValue() -> Int? { return nil } let a: Int? = nil let b: Int? = getValue() let c: Int? = 7 let finalValue = a ?? b ?? c ?? 0 | Swift

Swift - Operators and Expressions

Given the following Swift code, what will be the value of finalValue?

func getValue() -> Int? { return nil }
let a: Int? = nil
let b: Int? = getValue()
let c: Int? = 7
let finalValue = a ?? b ?? c ?? 0

Anil

B0

C7

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Evaluate each optional in the chain
a is nil, b is nil (from getValue()), c is 7 (non-nil).
Step 2: Apply nil coalescing operator
The expression a ?? b ?? c ?? 0 returns the first non-nil value, which is 7.
Final Answer:
7 -> Option C
Quick Check:
First non-nil in chain = 7 [OK]

Quick Trick: Chain ?? to find first non-nil, else default [OK]

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