The index -1 identifies the last element in a list.

Question

The index -1 identifies the last element in a list.

BlackTom AI · Accepted Answer

Consider what the statement is claiming about list indexing and the special value -1.
Option 1: True. In many programming languages, most notably Python, negative indices are used to access elements from the end of a list, with -1 referring to the last element, -2 to the second-to-last, and so on. This makes the statement true within that context and aligns with common list-access semantics in Python. However, it’s important to note that not all languages use -1 in the same way; some languages may not support negative indexing at all, or may use different conventions, which would affect the truth of the statement in those environments.
Option 2: False. If we interpret the claim as a universal rule across all programming languages, this would be inaccurate because several languages either do not support negative indexing, implement it differently, or require special syntax to access elements from the end. In languages without negative indexing, -1 would simply be a valid integer value, not an index to the last element, so the statement would be false in that broader context.
Further reflection: the correctness of the statement depends on the language in question. In a language like Python, expert programmers rely on -1 to retrieve the last item efficiently, which supports the true interpretation. If the question’s setting were a language without such indexing behavior, the claim would not hold there. These nuances are what determine whether the statement is considered true or false in practice.

2261 CS 0012 SEC1010 Final Quiz

The index -1 identifies the last element in a list.

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