Sum and product of an array: Difference between revisions

=={{header|Stata}}==

Mata does not have a builtin product function, but one can do the following, which will compute the product of nonzero elements of the array:

<lang stata>a = 1,-2,-3,-4,5

sum(a)

-3

(-1)^mod(sum(a:<0),2)*exp(sum(log(abs(a))))

-120</lang>