Discover arrays and the use of NumPy library for accessing arrays.

Tabular data as arrays

Arrays are tables of values. Just like with tables, we refer to particular cells by the row and column number. If we think about spreadsheets or tables, we know that cells are referred to in this way, such as B1B1 or C5C5, and the values in those cells can be used in calculations, such as C3+D7C3+D7.

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