# How to write cumulative product function

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Life is Wonderful on 15 Mar 2022
Commented: Life is Wonderful on 16 Mar 2022
Hi
I am trying to implement cumproduct without using built-in function. Below is my test code . I need help to implement "My Test code " like built-in cumprod([1 1 2 : 5]).
Thank you!!
% Built-in
A = cumprod([1 1 2 : 5])
% A
%------+
% 1
% 1
% 2
% 6
% 24
% 120
% My Test code ,
A1 = 1;
for i = 1 :5
A1 = A1 * i;
fprintf('%10d|%10d|\n',i,A1);
end
A1
-----+
1|
2|
6|
24|
120|
##### 2 CommentsShowHide 1 older comment
Voss on 15 Mar 2022
You're welcome!

Torsten on 16 Mar 2022
Edited: Torsten on 16 Mar 2022
m = 10;
v = [1 1 2:m];
pcum = cumproduct(v)
function pcum = cumproduct(v)
n = numel(v);
pcum = zeros(n,1);
pcum(1) = v(1);
for i = 2:n
pcum(i) = pcum(i-1)*v(i);
end
end
Life is Wonderful on 16 Mar 2022
Yes, would nice if you can share snippet !!
Thank you

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