python - Matematical operation between couple fo number in list

Question

I have a even list of numbers:

lst = [2,3,4,1,6,7]

I need to subtract the second number of each couple and sum the result of all couples, below the result:

out = 3-2+1-4+7-6

Is there any elegant solution? Appreciate any hints!

question from:https://stackoverflow.com/questions/65930604/matematical-operation-between-couple-fo-number-in-list

Answer 1

>>> sum(lst[1::2]) - sum(lst[::2])
-1