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What is an Index?
The first item in an Array.
The last item in an Array.
The position of an object in an Array.
The number of items in an Array.
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GPT-5 mini
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"The position of an object in an Array."
Brief note: an index identifies where an element sits. In most languages indexing starts at 0, so for array [a, b, c]:
- indices: 0, 1, 2
- first item index = 0
- last item index = length - 1 (here 2)
- number of items = length (here 3)
Brief note: an index identifies where an element sits. In most languages indexing starts at 0, so for array [a, b, c]:
- indices: 0, 1, 2
- first item index = 0
- last item index = length - 1 (here 2)
- number of items = length (here 3)
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