Dot product

Dot product
You are encouraged to solve this task according to the task description, using any language you may know.

Create a function/use an in-built function, to compute the wp:Dot product, also known as the scaler product of two vectors. If possible, make the vectors of arbitrary length. As an example, compute the dot product of the vectors [1, 3, -5] and [4, -2, -1].

To calculate the dot product of two vectors, each vector must be the same length; multiply corresponding terms from each vector then sum the result to produce the answer:

Python

<lang python>def dotp(a,b):

   assert len(a) == len(b), 'Vector sizes must match'
   return sum(aterm * bterm for aterm,bterm in zip(a, b))

if __name__ == '__main__':

   a, b = [1, 3, -5], [4, -2, -1]
   dotp(a,b)
   assert dotp(a,b) == 3</lang>