[Solved] Identify the problem in this Ruby code:arr = [1, 2, 3] puts arr[3] — Ans: Index 3 is out of range and returns nil | Ruby

Ruby - Arrays

Identify the problem in this Ruby code:

arr = [1, 2, 3]
puts arr[3]

ASyntax error due to missing parentheses

BIndex 3 is out of range and returns nil

Carr[3] returns 3

DArray indices start at 1, so arr[3] is valid

Step-by-Step Solution

Solution:

Step 1: Understand array indexing in Ruby
Ruby arrays start at index 0, so arr[3] is the fourth element, which does not exist.
Step 2: Check what happens when accessing out-of-range index
Accessing arr[3] returns nil, no error occurs.
Final Answer:
Index 3 is out of range and returns nil -> Option B
Quick Check:
Out-of-range index returns nil [OK]

Quick Trick: Array indices start at 0; out-of-range returns nil [OK]

Common Mistakes:

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