Index notation

In mathematics and computer programming, index notation is used to specify the elements of an array of numbers. The formalism of how indices are used varies according to the subject. In particular, there are different methods for referring to the elements of a list, a vector, or a matrix, depending on whether one is writing a formal mathematical paper for publication, or when one is writing a computer program.

"Subscript notation" redirects here. For other similarly named notations, see Double-subscript notation and Double-letter voltage subscript notation.
For index notation, or indicial notation in relativity theory and abstract algebra, see Einstein notation and abstract index notation.
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