Ruby - Arrays
What is the output of the following Ruby code?
arr = ['a', 'b', 'c', 'd'] puts arr[-1] puts arr[-3]
What is the output of the following Ruby code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand negative indexing in Ruby arrays
Negative indexes count from the end: -1 is last element, -2 is second last, etc.Step 2: Identify elements at arr[-1] and arr[-3]
arr[-1] is 'd' (last element), arr[-3] is 'b' (third from last).Final Answer:
d b -> Option BQuick Check:
Negative index -1 = last element [OK]
Quick Trick: Negative index -1 means last element in Ruby arrays [OK]
Common Mistakes:
- Confusing negative indexes with positive
- Expecting arr[-1] to be first element
- Thinking negative indexes cause errors
Master "Arrays" in Ruby
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