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Getting Started #
This getting started describes how to install, load, and use math.js.
Install #
Math.js can be installed using various package managers like [npm](https://npmjs.org/), or by just downloading the library from the website: [https://mathjs.org/download.html](https://mathjs.org/download.html).
To install via npm, run:
npm install mathjs
Other ways to install math.js are described on the [website](https://mathjs.org/download.html).
Load #
Math.js can be used in node.js and in the browser. The library must be loaded
and instantiated. When creating an instance, one can optionally provide
configuration options as described in
[Configuration](core/configuration.html).
ES modules #
Load the functions you need and use them:
```js
import { sqrt } from 'mathjs'
console.log(sqrt(-4).toString()) // 2i
```
To use lightweight, number only implementations of all functions:
```js
import { sqrt } from 'mathjs/number'
console.log(sqrt(4).toString()) // 2
console.log(sqrt(-4).toString()) // NaN
```
You can create a mathjs instance allowing [configuration](core/configuration.html) and importing of external functions as follows:
```js
import { create, all } from 'mathjs'
const config = { }
const math = create(all, config)
console.log(math.sqrt(-4).toString()) // 2i
```
How to optimize your bundle size using tree-shaking is described on the page
[Custom bundling](custom_bundling.html).
Node.js #
Load math.js in [node.js](https://nodejs.org/) (CommonJS module system):
```js
const { sqrt } = require('mathjs')
console.log(sqrt(-4).toString()) // 2i
```
Browser #
Math.js can be loaded as a regular JavaScript file in the browser, use the global
variable `math` to access the libary once loaded:
```html
```
Use #
Math.js can be used similar to JavaScript's built-in Math library. Besides that,
math.js can evaluate expressions (see [Expressions](expressions/index.html)) and
supports chaining (see [Chaining](core/chaining.html)).
The example code below shows how to use math.js. More examples can be found in the
section [Examples](https://mathjs.org/examples/index.html).
```js
// functions and constants
math.round(math.e, 3) // 2.718
math.atan2(3, -3) / math.pi // 0.75
math.log(10000, 10) // 4
math.sqrt(-4) // 2i
math.pow([[-1, 2], [3, 1]], 2) // [[7, 0], [0, 7]]
// expressions
math.evaluate('12 / (2.3 + 0.7)') // 4
math.evaluate('12.7 cm to inch') // 5 inch
math.evaluate('sin(45 deg) ^ 2') // 0.5
math.evaluate('9 / 3 + 2i') // 3 + 2i
math.evaluate('det([-1, 2; 3, 1])') // -7
// chained operations
math.chain(3)
.add(4)
.multiply(2)
.done() // 14
```
Next #
To learn more about math.js, check out the available documentation and examples:
- [Documentation](index.html)
- [Examples](https://mathjs.org/examples/index.html)