[Solved] Consider this Ruby code snippet: str = "Hello" str.upcase puts str str.upcase! puts str What is the error in this code? | Ruby

Ruby - Methods

Consider this Ruby code snippet:

str = "Hello"
str.upcase
puts str
str.upcase!
puts str

What is the error in this code?

ANo error; output is "HELLO" then "HELLO"

B<code>puts</code> cannot print strings

CCalling <code>upcase</code> without assignment does not change <code>str</code>

D<code>upcase!</code> method does not exist

Step-by-Step Solution

Solution:

Step 1: Analyze str.upcase call
str.upcase returns an uppercase string but does not change str itself unless assigned.
Step 2: Analyze str.upcase! call
str.upcase! modifies str in place, changing it to uppercase.
Final Answer:
Calling upcase without assignment does not change str -> Option C
Quick Check:
Non-bang needs assignment to change object [OK]

Quick Trick: Non-bang methods need assignment to change variable [OK]

Common Mistakes:

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