Returns the product as i goes from m
to n of the expression X.
Operands:
i is any Mathcad variable name.
X is any expression producing a value for each
element in i.
m and n are integers
with n > m. The acceptable range of values depends
on the size of X and the ORIGIN
of the worksheet.
If X consists of several terms, be sure to enclose
them in parentheses to keep them
inside the product operator.
Note:
The variable i is defined only within the iterated
product operator and therefore has no effect on, and is not influenced
by, variable definitions outside the product operator.