[Solved] Identify the error in this Ruby method:def check_number(num) if num > 0 return 'Positive' else 'Negative' end return end | Ruby

Ruby - Methods

Identify the error in this Ruby method:

def check_number(num)
  if num > 0
    return 'Positive'
  else
    'Negative'
  end
  return
end

AThe method has unreachable code after return.

BThe return keyword is used incorrectly inside if.

CThe else block should use return explicitly.

DThe method returns nil for negative numbers.

Step-by-Step Solution

Solution:

Step 1: Trace the if branch
If num > 0, return 'Positive' exits the method immediately.
Step 2: Trace the else branch
Else block evaluates 'Negative' as last expression (implicit return).
Step 3: Check post-conditional code
The final return (nil) is unreachable as if-else covers all paths.
Final Answer:
The method has unreachable code after return. -> Option A
Quick Check:
Complete if-else leads to unreachable code [OK]

Quick Trick: Check all paths return a value explicitly [OK]

Common Mistakes:

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