# Numbers, Arrays, Vectors, and Matrices

In the CSA Prediction Engine, we consistently represent numbers, arrays, and vectors in **at least two dimensions** to align with our mathematical framework. For example, a single number like 0.7 is written as `[[0.7]]`, while a row vector with K variables is noted as `[[11, 12, 13, ..., 1K]]`. Column vectors follow a similar logic, `[[11], [21], [31], ... [N1]]`.

Additionally, we adopt column-major operations, a natural approach for linear algebra, inherited from our respect for [Fortran’s](https://en.wikipedia.org/wiki/Fortran) roots (apologies to C users!).

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