[Solved] Given this code, what will be the output?def counter count = 0 lambda do count += 1 end end c = counter puts c.call puts c.call | Ruby

Ruby - Basics and Runtime

Given this code, what will be the output?

def counter
  count = 0
  lambda do
    count += 1
  end
end

c = counter
puts c.call
puts c.call

AError: undefined method 'call'

B0 0

C1 2

D1 1

Step-by-Step Solution

Solution:

Step 1: Analyze counter method return
counter returns a lambda that increments count.
Step 2: Check how c is assigned
c = counter assigns c to the lambda returned by the method (method called).
Step 3: Calling c.call increments count
Each call to c.call increments count by 1, so outputs 1 then 2.
Final Answer:
1 2 -> Option C
Quick Check:
Lambda increments count on each call [OK]

Quick Trick: Use parentheses to call method returning lambda [OK]

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