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Which of the following is the correct syntax to get elements from index 2 up to but not including index 5 in Ruby array arr?

easy📝 Syntax Q12 of 15
Ruby - Arrays
Which of the following is the correct syntax to get elements from index 2 up to but not including index 5 in Ruby array arr?
Aarr[2...5]
Barr[2:5]
Carr[2..5]
Darr[2-5]
Step-by-Step Solution
Solution:

  1. Step 1: Identify the range operator for excluding end

    In Ruby, ... excludes the end index, so 2...5 means indexes 2, 3, and 4.

  2. Step 2: Check syntax correctness

    Only arr[2...5] uses valid Ruby syntax for slicing excluding the end index.

  3. Final Answer:

    arr[2...5] -> Option A

  4. Quick Check:

    Use '...' to exclude end index in range [OK]
Quick Trick: Use '...' to exclude the last index in range slicing [OK]
Common Mistakes:
  • Using '..' when exclusion is needed
  • Using Python-style slicing syntax like ':'
  • Using invalid range syntax like '2-5'

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