[Solved] What will this Ruby code print? words = ['cat', 'dog', 'bird'] words.each { |w| puts w.upcase } — Ans: CAT DOG BIRD | Ruby

Ruby - Enumerable and Collection Processing

What will this Ruby code print?

words = ['cat', 'dog', 'bird']
words.each { |w| puts w.upcase }

Acat dog bird

BError: undefined method upcase

CCat Dog Bird

DCAT DOG BIRD

Step-by-Step Solution

Solution:

Step 1: Understand the each iteration and method call
Each word is passed to the block, and upcase converts it to uppercase.
Step 2: Determine the printed output
All words will be printed in uppercase: CAT, DOG, BIRD.
Final Answer:
CAT DOG BIRD -> Option D
Quick Check:
each with upcase = uppercase words [OK]

Quick Trick: Use string methods inside each block to transform elements [OK]

Common Mistakes:

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