Subtracting two arrays Matlab

this may sound awkward, i tried a loop but i am getting error(attempt to access), what i am trying to do is subtracting 2 arrays

A=[0;10;20;30;40]

V(1,1)=100 it starts with one value then changes its dimension to obtain V(2,1)=V(1)-A(1) and V(3,1)=V(2)-A(1) and the result will be

    V= [100;90;70;40;0]

i also tried `cumsum` , but may be i didn't use it right !

[Walter Roberson]

Does A(2) ever get used in the calculation?

[sami elahj]

yeah it does thats why V(2)=100-10=90, its like storing the value the V(1) then use it to get V(2)

Answer 1

[the cyclist]

A = [0;10;20;30;40]
V = 100 - cumsum(A);