How can i define the vector to variable scalar? I have A,B,C,D,E values all in size 1x1155. 
A=[1.0001, 1.0005, 1.00010,...,1.0009]. similar to B, C, D and E.
I need (A(1)+B(1))/(C(1)+D(1)E(1)) + (A(2)+B(2))/(C(2)+D(2)E(2)) + ... + (A(1155)+B(1155))/(C(1155)+D(1155)E(1155)). Therefore i need each individual variable using loop rather than defining one by one from 1 to 1155. Is there a way to do that in Matlab?
Use pointwise vector operations:

% given A,B,C,D,E
A = rand(1,1155);
B = rand(1,1155);
C = rand(1,1155);
D = rand(1,1155);
E = rand(1,1155);
% compute F
F = (A+B)./(C + D.*E);