Which statement best describes the behavior of the range operator when used for array slicing in Ruby?

hard📝 Conceptual Q10 of 15

Ruby - Arrays

ARanges cannot be used for array slicing in Ruby.

BBoth two-dot and three-dot ranges include the end index.

CThe two-dot range excludes the end index, and the three-dot range includes it.

DThe two-dot range (..) includes the end index, while the three-dot range (...) excludes it.

Step-by-Step Solution

Solution:

Step 1: Recall the difference between .. and ... in Ruby ranges
The two-dot range includes the end value; the three-dot excludes it.
Step 2: Understand how this applies to array slicing
When slicing arrays, .. includes the last index, ... excludes it.
Final Answer:
The two-dot range (..) includes the end index, while the three-dot range (...) excludes it. -> Option D
Quick Check:
.. includes end, ... excludes end in Ruby ranges [OK]

Quick Trick: .. includes end index; ... excludes end index in ranges [OK]

Common Mistakes:

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