This is a `playground`

to test code. It runs a full `Node.js`

environment and already has all of `npm`

’s 400,000 packages pre-installed, including `mathjs`

with all `npm`

packages installed. **Try it out**:

var mathjs = require("mathjs")

- all documents on RunKit are public
`require()`

any package directly from npm- use arrow functions, classes, template strings, and most of ES6
`await`

any promise instead of using callbacks (example)- create your own embedded
**node.js**snippets

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with different data types like numbers, big numbers, complex numbers, fractions, units, and matrices. Powerful and easy to use.

- Supports numbers, big numbers, complex numbers, fractions, units, strings, arrays, and matrices.
- Is compatible with JavaScript's built-in Math library.
- Contains a flexible expression parser.
- Does symbolic computation.
- Comes with a large set of built-in functions and constants.
- Can be used as a command line application as well.
- Runs on any JavaScript engine.
- Is easily extensible.
- Open source.

Math.js can be used in both node.js and in the browser.

Install math.js using npm:

```
npm install mathjs
```

Note that when using mathjs in a TypeScript project, you will have to install type definition files too:

`npm install @types/mathjs`

.

Or download mathjs via one of the CDN's listed on the downloads page:

https://mathjs.org/download.html

Math.js can be used similar to JavaScript's built-in Math library. Besides that, math.js can evaluate expressions and supports chained operations.

```
import {
atan2, chain, derivative, e, evaluate, log, pi, pow, round, sqrt
} from 'mathjs'
// functions and constants
round(e, 3) // 2.718
atan2(3, -3) / pi // 0.75
log(10000, 10) // 4
sqrt(-4) // 2i
pow([[-1, 2], [3, 1]], 2) // [[7, 0], [0, 7]]
derivative('x^2 + x', 'x') // 2 * x + 1
// expressions
evaluate('12 / (2.3 + 0.7)') // 4
evaluate('12.7 cm to inch') // 5 inch
evaluate('sin(45 deg) ^ 2') // 0.5
evaluate('9 / 3 + 2i') // 3 + 2i
evaluate('det([-1, 2; 3, 1])') // -7
// chaining
chain(3)
.add(4)
.multiply(2)
.done() // 14
```

See the Getting Started for a more detailed tutorial.

Math.js works on any ES5 compatible JavaScript engine: node.js, Chrome, Firefox, Safari, Edge, and IE11.

First clone the project from github:

```
git clone git://github.com/josdejong/mathjs.git
cd mathjs
```

Install the project dependencies:

```
npm install
```

Then, the project can be build by executing the build script via npm:

```
npm run build
```

This will build the library math.js and math.min.js from the source files and put them in the folder dist.

To execute tests for the library, install the project dependencies once:

```
npm install
```

Then, the tests can be executed:

```
npm test
```

Additionally, the tests can be run on FireFox using headless mode:

```
npm run test:browser
```

To run the tests remotely on BrowserStack, first set the environment variables `BROWSER_STACK_USERNAME`

and `BROWSER_STACK_ACCESS_KEY`

with your username and access key and then execute:

```
npm run test:browserstack
```

To test code coverage of the tests:

```
npm run coverage
```

To see the coverage results, open the generated report in your browser:

```
./coverage/lcov-report/index.html
```

Continuous integration tests are run on Travis CI and BrowserStack every time a commit is pushed to github. The test results can be checked on https://travis-ci.org/josdejong/mathjs. Travis CI runs the tests for different versions of node.js, and BrowserStack runs the tests are run on all major browsers.

Thanks Travis CI and BrowserStack for the generous free hosting of this open source project!

Copyright (C) 2013-2020 Jos de Jong wjosdejong@gmail.com

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

- package on npmhttps://npmjs.com/package/mathjs
- homepagehttps://mathjs.org
- licenseApache-2.0

RunKit is a free, in-browser JavaScript dev environment for prototyping **Node.js** code, with every **npm** package installed. Sign up to share your code.

Sign Up for Free