# ASINH

**The ASINH function returns the hyperbolic arcsine of a number.**

This function takes a single [Number](../../variable-data-types/the-number-variable-data-type) as input. It outputs that Number's inverse hyperbolic sine.

#### Declaration

```javascript
ASINH(number) -> hyperbolic_arcsine
```

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#### Parameters

**number** (required, type: `Number`) The number to calculate the hyperbolic arcsine of.

#### Return Values

**hyperbolic\_arcsine** (type: `Number`) The hyperbolic arcsine of the given number.

#### Examples

The following example returns the hyperbolic arcsine of 0.25:

```javascript
ASINH(0.25) -> 0.24746646154726346
```
