[Solved] Identify the error in this Ruby class that tries to customize to_s: class Car def initialize(model) @model = model end def to_s "Car model: " + model end end c = Car.new("Tesla") puts c.to_s | Ruby

Ruby - Classes and Objects

Identify the error in this Ruby class that tries to customize to_s:

class Car
  def initialize(model)
    @model = model
  end
  def to_s
    "Car model: " + model
  end
end

c = Car.new("Tesla")
puts c.to_s

AMissing return statement in to_s

BSyntax error in method definition

CUndefined local variable or method 'model'

DNo error, prints 'Car model: Tesla'

Step-by-Step Solution

Solution:

Step 1: Check variable usage inside to_s
The method uses model without @, but the instance variable is @model.
Step 2: Understand Ruby variable scope
Without @, Ruby looks for a local variable or method named model, which does not exist, causing an error.
Final Answer:
Undefined local variable or method 'model' -> Option C
Quick Check:
Instance variables need @ prefix inside methods [OK]

Quick Trick: Use @ before instance variables inside methods [OK]

Common Mistakes:

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