sum even and odd places values

I have

A=[4 6 2 1 45 98 2 3 65 12 32 32 15 42 15 14].

how to sum even and odd places values of A. i.e.

B(even places sum)=6+1+98+3+12+32+42+14=208, 

C(odd places sum)=4+2+45+2+65+32+15+15=180.

how to do it

Answer 1

[Andrei Bobrov]

B = sum(A(2:2:end));
C = sum(A(1:2:end));

Answer 2

[Alexandra Harkai]

len = length(A);
B = sum(A(mod(1:len, 2)==0));
C = sum(A(mod(1:len, 2)==1));