Jon Fletcher implements a method of estimating the value of Pi:

This series converges to Pi, the more terms that are added to the series, the closer the value is to Pi.

For the proof on why this series converges to Pi – https://proofwiki.org/wiki/Leibniz’s_Formula_for_Pi

There are several points to note about the series:– It’s infinite, we need to find a way to continue adding term after term.

– The denominator of the fraction increases by 2 every term.

– The terms alternate between positive and negative.

Click through for the implementation of the formula in Python. And what you should do if you really need to reference Pi in your Python code.