[Solved] What will be the output of the following Ruby code? def greet(*names) names.join(", ") end puts greet("Alice", "Bob", "Carol") | Ruby

Ruby - Methods

What will be the output of the following Ruby code?

def greet(*names)
  names.join(", ")
end

puts greet("Alice", "Bob", "Carol")

AAlice, Bob, Carol

B["Alice", "Bob", "Carol"]

CAlice Bob Carol

DError: wrong number of arguments

Step-by-Step Solution

Solution:

Step 1: Understand how *names works
The method collects all arguments into an array called names. Here, it will be ["Alice", "Bob", "Carol"].
Step 2: Analyze the join method
names.join(", ") joins array elements into a string separated by ", ". So the output is "Alice, Bob, Carol".
Final Answer:
Alice, Bob, Carol -> Option A
Quick Check:
Array joined with commas = Alice, Bob, Carol [OK]

Quick Trick: Remember join adds separator between array elements [OK]

Common Mistakes:

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