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# Function add

Add two or more values, `x + y`.
For matrices, the function is evaluated element wise.


## Syntax

```js
math.add(x, y)
math.add(x, y, z, ...)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Fraction &#124; Complex &#124; Unit &#124; Array &#124; Matrix | First value to add
`y` | number &#124; BigNumber &#124; Fraction &#124; Complex &#124; Unit &#124; Array &#124; Matrix | Second value to add

### Returns

Type | Description
---- | -----------
number &#124; BigNumber &#124; Fraction &#124; Complex &#124; Unit &#124; Array &#124; Matrix | Sum of `x` and `y`


## Examples

```js
math.add(2, 3)               // returns number 5
math.add(2, 3, 4)            // returns number 9

const a = math.complex(2, 3)
const b = math.complex(-4, 1)
math.add(a, b)               // returns Complex -2 + 4i

math.add([1, 2, 3], 4)       // returns Array [5, 6, 7]

const c = math.unit('5 cm')
const d = math.unit('2.1 mm')
math.add(c, d)               // returns Unit 52.1 mm

math.add("2.3", "4")         // returns number 6.3
```


## See also

[subtract](subtract.md),
[sum](sum.md)