Capital Pi Symbol
The capital Greek letter Pi () is used in math to represent the product operator. Typically, the product operator is used in an expression like this:
The product operator has three parts: the initial index variable value, the end value, and the expression being multiplied together. In plain language, the above expression means starting with , substitute the value of into the expression to get a subexpression. Increment the value of by adding one to its current value and substitute the value of into the expression again to get the second subexpression. Repeat this process until the value of reaches the end value and then multiply the resulting subexpressions together.
Symbol  Format  Data 

Π  Unicode 

TeX 


SVG 
Usage
The product operator multiplies the expression starting at an initial value, incrementing by one for each subexpression, and ending at the end value.
Related Symbols
The Greek letter π (pi) is used in trigonometry as a constant to represent a halfrotation around a circle in radians. The value of π is approximately 3.14 and appears in the geometric formulas for finding the circumference and area of the circle. The value of π can be calculated by dividing any circle's circumference by its diameter.