hello i am writing this blog because i asked a question but havent got asnwer for it, please explain me why do we need to use segment tree to calculate sums, why cant we just use c++ operator + (read more about this operator here — https://www.w3schools.com/cpp/cpp_operators.asp)

hello pleasy dont downvote me, it is my fourth blog, today i want to talk about segment tree
why are we using segment trees for calculating sums, when we can use operator + ? please dont laugh at me i am newbie help