mathjs/docs/reference/functions/size.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 size

Calculate the size of a matrix or scalar.


## Syntax

```js
math.size(x)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | Boolean | Number | Complex | Unit | String | Array | Matrix | A matrix

### Returns

Type | Description
---- | -----------
Array | Matrix | A vector with size of `x`.


## Examples

```js
math.size(2.3);                  // returns []
math.size('hello world');        // returns [11]

var A = [[1, 2, 3], [4, 5, 6]];
math.size(A);                    // returns [2, 3]
math.size(math.range(1,6));      // returns [5]
```


## See also

[resize](resize.md),
[squeeze](squeeze.md),
[subset](subset.md)


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