π Estimator

Original Inspiration

This program uses a random uniform distribution of doubles between 0 and 1 to estimate pi based on how many points are located in a radius of 1 compared to a square of 1 by 1. Written to compare the speed of execution across all kinds of different languages.

Test run on iMac 2017, Intel i7-7700K on macOS 11.4:

% ./piC 
Number of test cases: 10000000
Pi estimation: 3.141878 
Time taken: 0.515146 seconds

Let's see how many we can implement!

• C
• C++
• Swift
• Python
• JavaScript
• TypeScript
• C#
• Java
• More!
• Would love to see this program run on the GPU for a massive speed increase!

Contributing

Feel free to implement this in a new language! However, follow these guidelines:

• The output of the program should match the example above.
• Add instructions for running it in the new language, in a similar format to the previous README entries
• Follow the same calculation of estimating pi across all languages. This respository is designed to test execution speed with the only independent variable being the language.
• Feel free to give constructive criticism in improving all aspects of this repository and testing the efficiency of the code in terms of speed

Executing in a UNIX environment

When running the program, it will ask for a number of test cases. The more you enter the more accurate the pi estimation will be, and the longer it will take to execute.

To run all languages at the same time

./runall.sh

If you want to specify your own number of test cases, simply put the number as a parameter to the script:

./runall.sh 1000000

In C

gcc -o piC pi.c

then

./piC

In C++

g++ -o piCpp pi.c

then

./piCpp

In Swift

First check that you have Swift installed with

swift --version

It should be installed if you have Xcode installed. Then you can run with

swift pi.swift

this will build and run in one command.

In Python

First check that you have Python installed with

python --version

Then run with

python pi.py

In Javascript

First check that you have Javascript installed with

node -v

Then run with

node pi.js