[Solved] How can you modify this Swift function to accept both a variadic list of strings and an optional prefix string?func printPrefixed(_ strings: String...) { for s in strings { print(s) } } | Swift

Swift - Functions

How can you modify this Swift function to accept both a variadic list of strings and an optional prefix string?

func printPrefixed(_ strings: String...) {
    for s in strings {
        print(s)
    }
}

AAdd a second parameter with default value after the variadic parameter

BAdd a second parameter with default value before the variadic parameter

CMake the variadic parameter optional

DUse an array parameter instead of variadic

Step-by-Step Solution

Solution:

Step 1: Recall parameter order rules
Variadic parameter must be last, so optional prefix must come before it.
Step 2: Modify function signature
Adding optional prefix before variadic parameter with default value allows calling without prefix.
Final Answer:
Add a second parameter with default value before the variadic parameter -> Option B
Quick Check:
Variadic parameter must be last; optional params before it [OK]

Quick Trick: Place optional params before variadic parameter [OK]

Common Mistakes:

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How can you modify this Swift function to accept both a variadic list of strings and an optional prefix string?