Explain the Number Function ' PI' in Tableau with Example?

 In Tableau, the PI function is a number function that returns the mathematical constant π (pi). Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter and is approximately equal to 3.14159.

The PI function does not require any arguments or parameters. It simply returns the value of π.

Here's an example to illustrate the usage of the PI function in Tableau:

To calculate the circumference of a circle with a known radius, you can use the PI function in conjunction with other mathematical operations. Let's say you have a dataset with a column called "Radius" that contains the radius values of different circles:

Radius
5.0
7.5
10.0

To calculate the circumference of each circle using the PI function, you can create a calculated field in Tableau:

1. Right-click on a blank area in the "Data" pane in Tableau.
2. Select "Create Calculated Field."
3. In the formula editor, enter the following expression:

2 * PI() * [Radius]

4. Click "OK" to create the calculated field.

The calculated field utilizes the PI function to retrieve the value of π and then performs the necessary calculations to determine the circumference of each circle.

The resulting dataset will be as follows:

Radius	Circumference
5.0	31.4159
7.5	47.1239
10.0	62.8319

In this example, the PI function is used to calculate the circumference of each circle by multiplying the radius with 2π (2 times pi).

The PI function is commonly used in mathematical calculations and can be combined with other mathematical functions or operators to perform complex calculations involving circles, trigonometry, and geometry. By utilizing the PI function in Tableau, you can easily incorporate this mathematical constant into your calculations and visualizations.