wangpengju / bignumber.js

Arithmetic operations on big numbers

BigNumber.js

BigNumber.js is a light javascript library for node.js and the browser. It supports arithmetic operations on Big Integers.

It is build with performance in mind, uses the fastest algorithms and supports all basic arithmetic operations (+, -, *, /, %, ^, abs). Works with both positive and negative big integers.

: (http://alexbardas.github.io/bignumber.js/)

Install: npm install

Test: npm test

Usage:

• in node:

	var BigNumber = require('big-number');

    BigNumber(5).plus(97).minus(53).plus(434).multiply(5435423).add(321453).multiply(21).div(2).pow(2);
    // 760056543044267246001

• in the browser:

	<script src ="big-number.js"></script>

    n(5).plus(97).minus(53).plus(434).multiply(5435423).add(321453).multiply(21).div(2).pow(2);
    // 760056543044267246001

API

Supported methods: add/plus, minus/subtract, multiply/mult, divide/div, power/pow, mod, equals, lt, lte, gt, gte, isZero, abs

Addition

	BigNumber(2).plus(10); // or
	BigNumber(2).add(10);

Subtraction

	BigNumber(2).minus(10); // or
	BigNumber(2).subtract(10);

Multiplication

	BigNumber(2).multiply(10); // or
	BigNumber(2).mult(10);

Division

	BigNumber(2).divide(10); // or
	BigNumber(2).div(10);

Modulo

	BigNumber(53).mod(14);

Power

	BigNumber(2).power(10); // or
	BigNumber(2).pow(10);