# An extensive math library for JavaScript and Node.js #

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.

Math.js version 4.0.0 has been released on 2018-02-25. This version contains breaking changes, so be careful when upgrading. Check out the History page for details.

# Features #

- Supports numbers, big numbers, complex numbers, fractions, units, strings, arrays, and matrices.
- Is compatible with JavaScriptâ€™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.

# Example #

Here some example code demonstrating how to use the library. Click here to fiddle around.

```
// 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.derivative('x^2 + x', 'x'); // 2*x+1
math.pow([[-1, 2], [3, 1]], 2);
// [[7, 0], [0, 7]]
// expressions
math.eval('1.2 * (2 + 4.5)'); // 7.8
math.eval('12.7 cm to inch'); // 5 inch
math.eval('sin(45 deg) ^ 2'); // 0.5
math.eval('9 / 3 + 2i'); // 3 + 2i
math.eval('det([-1, 2; 3, 1])'); // -7
// chaining
math.chain(3)
.add(4)
.multiply(2)
.done(); // 14
```

# Demo #

Try the expression parser below.

See Math Notepad for a full application.

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Shortcut keys:

- Press
**S**to set focus to the input field - Press
**Ctrl+F11**to toggle full screen - Enter
**"clear"**to clear history