---
title: "atan"
excerpt: "Computes the arctangent of a number (in radians)."
layout: manual
---

Computes the arctangent of a number (in radians).



```js
atan(num: number) -> number
```

### Tags

* `math`

### Examples

```js
const myVar = atan(1.0)
```

### Arguments

* `num`: `number` (REQUIRED)

### Returns

`number`