[Solved] Find the error in this Ruby class that attempts to override to_s: class User def to_s "User: " + @username end u = User.new puts u.to_s | Ruby

Ruby - Classes and Objects

Find the error in this Ruby class that attempts to override to_s:

class User
  def to_s
    "User: " + @username
end

u = User.new
puts u.to_s

AMissing <code>end</code> keyword for the to_s method

BUsing + operator instead of interpolation

CCalling to_s on an uninitialized variable

DNo error, code runs fine

Step-by-Step Solution

Solution:

Step 1: Check method definition
The to_s method lacks a closing end keyword.
Step 2: Confirm other parts
Using + for string concatenation is valid. The variable @username may be nil but won't cause syntax error. The object u is instantiated correctly.
Final Answer:
Missing end keyword for the to_s method -> Option A
Quick Check:
Syntax error due to missing end [OK]

Quick Trick: Every method must end with end keyword [OK]

Common Mistakes:

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