The FORTRAN level-1 BLAS call for this operation is
Here
is replaced by S, D, C, or Z
to indicate the data type of the operands (single, double, complex, double precision complex).
Parameter N equals the length of the vectors, n .
Parameters X, and Y equal the
addresses of where vectors x , and y start in
memory. The strides for the vectors are given in INCX and INCY.
The result 
is returned as the function value.