What is indices ?

Indices

 The term "indices" is the plural of "index", and its meaning depends on the context in which it's used. Here are a few common contexts:
1. Mathematics / Programming

  • Index refers to the position of an element in a list or array.

  • Indices are multiple positions.

Example:

python
arr = [10, 20, 30]
# Index 0 = 10, Index 1 = 20, etc.

"The indices of this array range from 0 to 2."

2. Finance

  • An index is a statistical measure of change in a market.

  • Indices (like the S&P 500, Dow Jones, Nasdaq) track the performance of groups of stocks.

Example:

"Stock market indices are used to gauge the health of the economy."

3. Publishing / Books

  • An index is the alphabetical listing at the end of a book with topics and page numbers.

  • Indices are multiple such lists (rare usage).

4. Databases / Search Engines

  • An index helps speed up the retrieval of data.

  • Indices refer to multiple such data structures.

Summary:

ContextSingularPluralMeaning
MathIndexIndicesPosition in a list/array
FinanceIndexIndicesMarket performance trackers
BooksIndexIndexes*List of topics at the back
DatabasesIndexIndicesData structure for fast search

"Indexes" is also accepted in non-technical English but "indices" is more common in academic or technical fields.

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