how to multiply every element in an array?

o=[3,1,9];

This is an example of array. I want to multiply them each others. For example;

3x1x9 = 27

The lenght of array could be different. How can I calculate the multiplaction with for loop.

Answer 1

[Voss]

o = [3 1 9];

% no for loop:
p = prod(o);
disp(p);

    27

% some for loop:
p = 1;
for ii = 1:numel(o)
    p = p*o(ii);
end
disp(p);

    27

[Cem Kurukaya]

thanks a lot

[Voss]

You're welcome!

Answer 2

[Torsten]

product = prod(o) 

is the short version,

product = 1.0;
for i = 1:numel(o)
    product = product*o(i);
end
product

is the long version.

[Cem Kurukaya]

thanks a lot