Question:

I am trying to use math.js (<a href="http://mathjs.org/docs/reference/functions/inv.html" rel="nofollow">http://mathjs.org/docs/reference/functions/inv.html</a>) but I can't see how to include it in an HTML file.

I have read that you can include it by adding this to the file:

```
var math = require('mathjs');
```

but that didn't work for me

I realize this sounds like a really stupid question but I have tried to figure it out myself and have not been successful.

To answer my question just show a complete HTML file (not just a bit of code from one) that successfully uses math.js

Thanks

I tried what Alexander O'Mara suggested and I got this:

```
/** * Math.js can easily be extended with functions and variables using the * `import` function. The function `import` accepts a module name or an object * containing functions and variables. */ // load math.js (using node.js) var math = require('../index'); /** * Define new functions and variables */ math.import({ myConstant: 42, hello: function (name) { return 'hello, ' + name + '!'; } }); // defined methods can be used in both JavaScript as well as the parser print(math.myConstant * 2); // 84 print(math.hello('user')); // 'hello, user!' print(math.eval('myConstant + 10')); // 52 print(math.eval('hello("user")')); // 'hello, user!' /** * Import the math library numbers.js, https://github.com/sjkaliski/numbers.js * The library must be installed first using npm: * npm install numbers */ try { // load the numbers.js library var numbers = require('numbers'); // import the numbers.js library into math.js math.import(numbers, {wrap: true, silent: true}); if (math.fibonacci) { // calculate fibonacci print(math.fibonacci(7)); // 13 print(math.eval('fibonacci(7)')); // 13 } } catch (err) { console.log('Warning: To import numbers.js, the library must ' + 'be installed first via `npm install numbers`.'); } /** * Import the math library numeric.js, http://numericjs.com/ * The library must be installed first using npm: * npm install numeric */ try { // load the numeric.js library var numeric = require('numeric'); // import the numeric.js library into math.js math.import(numeric, {wrap: true, silent: true}); if (math.eig) { // calculate eigenvalues of a matrix print(math.eval('eig([1, 2; 4, 3])').lambda.x); // [5, -1]; // solve AX = b var A = math.eval('[1, 2, 3; 2, -1, 1; 3, 0, -1]'); var b = [9, 8, 3]; print(math.solve(A, b)); // [2, -1, 3] } } catch (err) { console.log('Warning: To import numeric.js, the library must ' + 'be installed first via `npm install numeric`.'); } /** * By default, the function import does not allow overriding existing functions. * Existing functions can be overridden by specifying option `override: true` */ math.import({ pi: 3.14 }, { override: true }); print(math.pi); // returns 3.14 instead of 3.141592653589793 /** * Helper function to output a value in the console. Value will be formatted. * @param {*} value */ function print (value) { var precision = 14; console.log(math.format(value, precision)); }
```

Answer1:You shouldn't use require in the browser. You should try something like this:

```
<!DOCTYPE HTML>
<html>
<head>
<script src="math.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
// use math.js
math.sqrt(-4); // 2i
</script>
</body>
</html>
```

check the docs: <a href="http://mathjs.org/docs/getting_started.html" rel="nofollow">http://mathjs.org/docs/getting_started.html</a>

Answer2:They have a restful API you can use, <a href="http://api.mathjs.org" rel="nofollow">http://api.mathjs.org</a>. OR you should be able to just download the production from <a href="http://mathjs.org/download.html" rel="nofollow">here</a> and include that in your JS.

In your head tag:

```
<script src="math.js" type="text/javascript"></script>
```

Answer3:The easiest way to you is to include `math.js`

from a CDN:

```
<head>
<script src=https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.3.0/math.min.js></script>
</head>
```

Every script you need, search in Google for the CDN (in this example <a href="http://www.google.com/search?q=mathjs+cdn" rel="nofollow">`mathjs cdn`

</a>, and include it to your page HEAD. This way you don't need to download anything to your server.

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Google works directly with the key stakeholders for each library effort and accepts the latest versions as they are released.

</blockquote> <ul><li><a href="https://cdnjs.com/" rel="nofollow">cdnjs.com</a></li> </ul><blockquote>Everyone loves the Google CDN right? Even Microsoft runs their own CDN. The problem is, they only host the most popular libraries. We host all the popular libraries - JavaScript, CSS, SWF, images, etc! Join us now on GitHub!

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