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# PI Function in Excel

In this post, you will learn about the PI function in Excel and how to use it in your excel spreadsheets.

The function returns the constant value Ï€ or pi which is approximately equal to 3.14159265.

## PI Function in Excel

Syntax

`=PI()`

This syntax has no arguments

## How to use PI Function in Excel?

• This is an alternative in the use of the value pi. It is used instead of the approximate value 3.1415â€¦
• This function is used in various Excel mathematical formulas and functions.
• The below example uses the constant pi to find the Circumference of the circle of radius 6.
• Note: Circumference of a circle â€“ 2 x Ï€ x radius.
• The below example uses the pi value to find the Area of a circle of radius.
• Note: Area of a circle â€“ Ï€ x (radius)2

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