# π

## Getting started

What makes π so special? It's indeed everywhere, but why?

People often remember π as 3.14 but it's not its exact value. However, nobody knows the value. There are infinite digits of π.

Scientists have been using super calculators to compute billions of decimals of π, discovering critical patterns and infinite shapes.

However π seems to go way beyond mathematics.

## Geometry

π helps define the circumference of a circle (C):

d is the circle's diameter. The diameter is two times the radius, which is why you often read the following:

## Pi is everywhere

π seems to be the "perfect" tool to describe nothing less than the fundamental principles of the Universe.

It's used in all areas of mathematics and physics, but also in popular culture and internet communities, making it a god-like number for people with various backgrounds and interests.

However, it's not just another meme, as it has many practical uses in various sectors such as industry, science, or even aircraft design.

## Pi in code

π is everywhere, including programs.

It is available in various programming languages. JavaScript developers sometimes invoke an approximation of π (Math.PI) to create shapes and animations.

It's particularly helpful to increase amplitude and angle, for example, when you rotate objects.

## Into the unknown

There are so many theories involving π, but this number looks abnormal (some would even say paranormal).

Pi seems permanent and unchanging, beyond the Universe itself.

The first use of the Greek letter "π" in mathematics was an abbreviation of "periphery".