Product Notation


The capital Greek letter Pi is used to represent the product operator in mathematics. The operator has three parts: an initial value, an end value, and the expression being evaluated. Typically, the product operator is used in an example like this:

How It Works

To evaluate the result, the expression starts at the initial state and increments the counting variable until the end value is reached. Each subsequent expression is multiplied together to get the final result.

Product Notation

For example, the expression below starts at the variable is equal to one and iterates until is equal to three. At each iteration the expression is evaluated with the current value of and multiplied with the prior expressions.