how to calculate different variable list on python

Question

Using the same data, make a Python coding for ∑XiYi

Data

X = 4 6 8 10 14 16 20 22 24 28

Y = 30 18 22 28 14 22 16 8 20 8

For example:

Test Result

print(XiYi)

[120, 108, 176, 280, 196, 352, 320, 176, 480, 224]

print(sumXiYi)

2432

Answer 1

You can use zip:

X = [4, 6, 8, 10, 14, 16, 20, 22, 24, 28]
Y = [30, 18, 22, 28, 14, 22, 16, 8, 20, 8]
print(sum(x*y for x,y in zip(X,Y)))

Output:

2432

Answer 2

You can use enumerate:

X = [4, 6, 8, 10, 14, 16, 20, 22, 24, 28]
Y = [30, 18, 22, 28, 14, 22, 16, 8, 20, 8]
XiYi = [Y[i]*x for i, x in enumerate(X)]

print(XiYi)
[120, 108, 176, 280, 196, 352, 320, 176, 480, 224]

print(sum(XiYi))
2432