Pi (π) is a mathematical constant representing the ratio of a circle's circumference to its diameter. The first 10 digits of pi are 3.1415926535, and it goes on indefinitely. If you're interested in seeing more digits, the first million digits of pi are available online.

Here are some key aspects of pi:

- *Mathematical Significance*: Pi is an irrational number, meaning it can't be expressed as a simple fraction, and its decimal representation goes on forever without repeating.

- *Practical Applications*: Pi is essential in various mathematical calculations, such as determining the circumference of a circle (C = 2πr) or the area of a circle (A = πr²).

- *Pi Day Celebrations*: Pi Day is celebrated on March 14 (3/14) to commemorate the first three digits of pi. You can even find Pi Day merchandise online.

Additionally, Pi is also associated with:

- *Pi Network*: A cryptocurrency project that allows users to mine Pi coins using a mobile app, focusing on decentralization, security, and user-friendliness ¹ ²#PiCoreTeam