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<h1 id="function-im">Function im <a href="#function-im" title="Permalink">#</a></h1>

Get the imaginary part of a complex number.
For a complex number `a + bi`, the function returns `b`.

For matrices, the function is evaluated element wise.


<h2 id="syntax">Syntax <a href="#syntax" title="Permalink">#</a></h2>

```js
math.im(x)
```

<h3 id="parameters">Parameters <a href="#parameters" title="Permalink">#</a></h3>

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix |  A complex number or array with complex numbers

<h3 id="returns">Returns <a href="#returns" title="Permalink">#</a></h3>

Type | Description
---- | -----------
number &#124; BigNumber &#124; Array &#124; Matrix | The imaginary part of x


<h3 id="throws">Throws <a href="#throws" title="Permalink">#</a></h3>

Type | Description
---- | -----------


<h2 id="examples">Examples <a href="#examples" title="Permalink">#</a></h2>

```js
const a = math.complex(2, 3)
math.re(a)                     // returns number 2
math.im(a)                     // returns number 3

math.re(math.complex('-5.2i')) // returns number -5.2
math.re(math.complex(2.4))     // returns number 0
```


<h2 id="see-also">See also <a href="#see-also" title="Permalink">#</a></h2>

[re](re.html),
[conj](conj.html),
[abs](abs.html),
[arg](arg.html)