Which of the following function declarations correctly omits the argument label for the first parameter?

easy📝 Syntax Q12 of 15

Swift - Functions

Afunc greet(_name: String) { print("Hello, \(_name)!") }

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

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

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

Step-by-Step Solution

Solution:

Step 1: Identify correct underscore usage
The underscore must appear before the parameter name with a space, like _ name: String.
Step 2: Check each option
func greet(_ name: String) { print("Hello, \(name)!") } uses _ name: String correctly. func greet(name: String) { print("Hello, \(name)!") } uses a label. func greet(name _ : String) { print("Hello, \(name)!") } has wrong syntax. func greet(_name: String) { print("Hello, \(_name)!") } uses an invalid parameter name.
Final Answer:
func greet(_ name: String) { print("Hello, \(name)!") } -> Option B
Quick Check:
Correct underscore syntax = func greet(_ name: String) { print("Hello, \(name)!") } [OK]

Quick Trick: Underscore must be alone before parameter name [OK]

Common Mistakes:

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