How to calculate sum without loop?

Hello,

I must calculate S in the range of n=1 to n=100 without a loop.

s=(1...100)(101-n)*cos(n/100)

Example= 100*cos(1/100) + 99*cos(2/100) ... + 1*cos(100/100)

Answer 1

[KSSV]

n = 1:100 ;
s = sum(n.*cos(n/100))

[Aditya Kommajosula]

If I understand the OP's question right, the solution might have to be:

n = 1:100;
s = sum(n(end:-1:1).*cos(n/100));

Regards

[Numerical Noob]

Thank you Aditya, I tried it with an iterative approach with n=1..3. Your solution is right.