#!/usr/bin/python3
import numpy as np
def main():
	a=np.array([1,2])
	b=np.array([3,4])
	l1=[1,2]
	l2=[3,4]
	#dot product
	dot=0
	for i in range(len(l1)):
		dot+=a[1]*b[i]
	print(dot)
	#dot product arrays
	c=a*b
	d=sum (c)
	print (d)
	########
	dot=np.dot(a,b)
	dot=a@b
	print(a@b)

if __name__=="__main__":
	main()