# DotProduct

To compute the dot product of two vectors, use:

`Sum(A*B, I)`

where «I» is the index shared by the two vectors.

The DotProduct function does the same, i.e., DotProduct(A, B, I). Analytica's parser recognizes a dot product of the form Sum(A*B, I) and optimizes it as a call to DotProduct, which avoids an allocation for the intermediate value of `A*B`

. But DotProduct is not intended to be used explicitly.

## See Also

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