# Function dot Calculate the dot product of two vectors. The dot product of `A = [a1, a2, a3, ..., an]` and `B = [b1, b2, b3, ..., bn]` is defined as: dot(A, B) = a1 * b1 + a2 * b2 + a3 * b3 + ... + an * bn ## Syntax ```js math.dot(x, y) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | Array | Matrix | First vector `y` | Array | Matrix | Second vector ### Returns Type | Description ---- | ----------- number | Returns the dot product of `x` and `y` ## Examples ```js math.dot([2, 4, 1], [2, 2, 3]); // returns number 15 math.multiply([2, 4, 1], [2, 2, 3]); // returns number 15 ``` ## See also [multiply](multiply.md), [cross](cross.md)