How to use PI function in Excel?

In Excel, the PI function is used to return the mathematical constant π (pi), which is approximately 3.14159265358979. This function is handy when performing calculations involving circles, such as finding the circumference or area based on a radius.

Here’s how you can use the PI function in Excel:

   =PI()

Basic Usage: To simply return the value of π, type the following formula into a cell:

This will display 3.14159265358979 in the cell.

   =2 * PI() * A1

   =PI() * A1^2

Calculating the Circumference of a Circle: If you want to calculate the circumference of a circle with a given radius (let’s say the radius is in cell A1), you can use the formula for circumference, which is (2 times pi times text{radius}):
Calculating the Area of a Circle: To calculate the area of a circle with a given radius, use the formula for the area, which is (pi times text{radius}^2):

Here, `A1` is the cell that contains the radius of the circle. You can replace `A1` with any cell reference or a numeric value.

Using PI in Other Formulas: The PI function can be used in any formula where you need the value of π. It doesn’t take any arguments, so you simply use it as `PI()` in calculations.

Remember, the PI function in Excel does not require any arguments—simply invoking it as `=PI()` provides the value of π.

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