# numeric.atn()

Arctangent function. The arctangent is the angle whose tangent
is number.

```
numeric.atn( )
```

**Returns:** number

*This function does not take any arguments.*

# Examples

```cfml
angle_tangent = 1;
dump(angle_tangent.Atn());

```

# Categories

[Numbers](../../../categories/number.md), [Math](../../../categories/math.md)

# See Also

[Atn()](../../functions/atn.md), [numeric](../numeric.md)