[Solved] What will be the output of this Ruby code? str = "hello" result = str.upcase! puts result puts str — Ans: HELLO HELLO | Ruby

Ruby - Methods

What will be the output of this Ruby code?

str = "hello"
result = str.upcase!
puts result
puts str

AHELLO HELLO

Bhello hello

CHELLO hello

Dnil hello

Step-by-Step Solution

Solution:

Step 1: Understand upcase! effect
The upcase! method changes the string to uppercase in place and returns the modified string.
Step 2: Check output of result and str
Both result and str will be "HELLO" because the original string was changed.
Final Answer:
HELLO HELLO -> Option A
Quick Check:
upcase! modifies and returns changed string [OK]

Quick Trick: Bang methods return modified object, not a new one [OK]

Common Mistakes:

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