mathjs/docs/reference/functions/mod.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 mod

Calculates the modulus, the remainder of an integer division.

For matrices, the function is evaluated element wise.

The modulus is defined as:

    x - y * floor(x / y)

See https://en.wikipedia.org/wiki/Modulo_operation.


## Syntax

```js
math.mod(x, y)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Fraction &#124; Array &#124; Matrix | Dividend
`y` | number &#124; BigNumber &#124; Fraction &#124; Array &#124; Matrix | Divisor

### Returns

Type | Description
---- | -----------
number &#124; BigNumber &#124; Fraction &#124; Array &#124; Matrix | Returns the remainder of `x` divided by `y`.


## Examples

```js
math.mod(8, 3)                // returns 2
math.mod(11, 2)               // returns 1

function isOdd(x) {
  return math.mod(x, 2) != 0
}

isOdd(2)                      // returns false
isOdd(3)                      // returns true
```


## See also

[divide](divide.md)