[Solved] Examine this Swift code:func createAdder(_ base: Int) -> (Int) -> Int { return { value in base + value } } let addFive = createAdder(5) print(addFive(10))What programming concept is illustrated here... | Swift

Swift - Functions

Examine this Swift code:

func createAdder(_ base: Int) -> (Int) -> Int {
    return { value in base + value }
}

let addFive = createAdder(5)
print(addFive(10))

What programming concept is illustrated here and what will be printed?

AFunction overloading; prints 5

BClosure capturing external variable; prints 15

CRecursion; prints 10

DProtocol conformance; prints 0

Step-by-Step Solution

Solution:

Step 1: Identify the returned function
The function createAdder returns a closure that adds base to its input.
Step 2: Understand closure capturing
The closure captures the base variable from its surrounding context.
Step 3: Calculate output
Calling addFive(10) adds 5 + 10 = 15.
Final Answer:
Closure capturing external variable; prints 15 -> Option B
Quick Check:
Closures capture context variables [OK]

Quick Trick: Closures capture variables from surrounding scope [OK]

Common Mistakes:

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