mathjs/docs/reference/functions/fix.md

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 dif

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# Function fix

Round a value towards zero.
For matrices, the function is evaluated element wise.


## Syntax

```js
math.fix(x)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Fraction &#124; Complex &#124; Array &#124; Matrix | Number to be rounded

### Returns

Type | Description
---- | -----------
number &#124; BigNumber &#124; Fraction &#124; Complex &#124; Array &#124; Matrix | Rounded value


## Examples

```js
math.fix(3.2)                // returns number 3
math.fix(3.8)                // returns number 3
math.fix(-4.2)               // returns number -4
math.fix(-4.7)               // returns number -4

const c = math.complex(3.2, -2.7)
math.fix(c)                  // returns Complex 3 - 2i

math.fix([3.2, 3.8, -4.7])   // returns Array [3, 3, -4]
```


## See also

[ceil](ceil.md),
[floor](floor.md),
[round](round.md)