rational.js

rational number library

Installation

## for cli
npm install --global rational.js

## for library usage
npm install rational.js

Functions

• rational :: f -> a/b where f is floating number, a,b are integers
• number :: rational -> number
• add
• minus
• multiply
• divide
• pow

Command Line Usage

> rational 3.14
157/50

Typescript Signatures

Core functions:

type rational = [number, number]

let MAX_ERROR: number // 1e-12

// convert floating point number into rational
function rational(f: number, maxError?: number): rational

// convert rational into floating point number
function number(x: rational): number

function normalize(x: rational): rational

// find the greatest common divisor
function gcd(a: number, b: number): number

Math functions:

function add(x: rational, y: rational): rational

function minus(x: rational, y: rational): rational

function multiply(x: rational, y: rational): rational

function divide(x: rational, y: rational): rational

function pow(x: rational, y: rational): rational

Format function:

// convert rational into string in "a/b" format
function toString(rational: rational): string

License

This project is licensed with BSD-2-Clause

This is free, libre, and open-source software. It comes down to four essential freedoms [ref]:

• The freedom to run the program as you wish, for any purpose
• The freedom to study how the program works, and change it so it does your computing as you wish
• The freedom to redistribute copies so you can help others
• The freedom to distribute copies of your modified versions to others