[Solved] Which of the following Swift function declarations correctly uses a default parameter value? — Ans: func greet(name: String = "Guest") { print("Hello, \(name)!") } | Swift

Swift - Functions

Which of the following Swift function declarations correctly uses a default parameter value?

Afunc greet(name: String = "Guest") { print("Hello, \(name)!") }

Bfunc greet(name: String) = "Guest" { print("Hello, \(name)!") }

Cfunc greet(name: String default "Guest") { print("Hello, \(name)!") }

Dfunc greet(name: String) { print("Hello, \(name = Guest)!") }

Step-by-Step Solution

Solution:

Step 1: Review Swift default parameter syntax
The correct syntax is to assign a default value with '=' inside the parameter list.
Step 2: Check each option
Only func greet(name: String = "Guest") { print("Hello, \(name)!") } uses the correct syntax: name: String = "Guest".
Final Answer:
func greet(name: String = "Guest") { print("Hello, \(name)!") } -> Option A
Quick Check:
Default parameter syntax = parameter = value [OK]

Quick Trick: Use '=' to assign default values in parameter list [OK]

Common Mistakes:

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Which of the following Swift function declarations correctly uses a default parameter value?