The product operator calculates the sum of all the elements in a vector or calculates the product of an expression that contains a range variable.
The summation operator has two forms:
Operator
Description
Returns the product over i of the expression X.
Returns the product of the expression X as j goes from m to n .
Operands
• i is the name of range variable.
• j is the name of a local range variable.
• X is an expression that typically contains i or j and which evaluates to a real number.
• m, n are real numbers. n > m.
Additional Information
• Leave the top placeholder of the product operator empty depending on the kind of product you want to perform.
• When you define a range variable inside the summation operator, type equal after the local range variable name or insert the local range operator from the Ribbon.
• Since variables m and n are real numbers, it follows that you can specify non-integer real limits such as m=0.4 and n=3.7. In this case, the number of elements that are operated on by the product operator may vary depending on the actual values of m and n.
