mathjs/docs/reference/functions/inv.md

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

# Function inv

Calculate the inverse of a square matrix.


## Syntax

```js
math.inv(x)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | Number | Complex | Array | Matrix | Matrix to be inversed

### Returns

Type | Description
---- | -----------
Number | Complex | Array | Matrix | The inverse of `x`.


## Examples

```js
math.inv([[1, 2], [3, 4]]);  // returns [[-2, 1], [1.5, -0.5]]
math.inv(4);                 // returns 0.25
1 / 4;                       // returns 0.25
```


## See also

[det](det.md),
[transpose](transpose.md)


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