Which of the following is the correct way to declare a variadic parameter in Swift?

easy📝 Syntax Q12 of 15

Swift - Functions

Afunc sum(numbers: Int*) { }

Bfunc sum(numbers: [Int]) { }

Cfunc sum(numbers: Int...) { }

Dfunc sum(numbers: Int) { }

Step-by-Step Solution

Solution:

Step 1: Recall variadic syntax in Swift
Variadic parameters use three dots (...) after the type.
Step 2: Check each option
func sum(numbers: Int...) { } uses 'Int...' which is correct syntax for variadic parameters.
Final Answer:
func sum(numbers: Int...) { } -> Option C
Quick Check:
Variadic syntax = Type... [OK]

Quick Trick: Look for three dots (...) after type for variadic [OK]

Common Mistakes:

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