# GoLang – Find Inverse Hyperbolic – Atanh() Function – Examples & Explanation

`Atanh()` function is used to find the inverse hyperbolic tangent for the given input (`x` – parameter) in Go language.
The standard math package of Go programming language has `Atanh()` function. The purpose of this function is to find the inverse of the hyperbolic tangent function.

## Syntax of `Atanh()` Function in Go Language

The syntax of `Atanh()` function in Go Language is:

```func Atanh(x float64) float64
```

Note: `float64` is a data type in Go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:
```Atanh(1) = +Inf Atanh(±0) = ±0 Atanh(-1) = -Inf Atanh(x) = NaN if x < -1 or x > 1 Atanh(NaN) = NaN```

## Parameters of `Atanh()` Function in Go Language

`x ` – Where `x` is any Valid `float64` Input value. This parameter is required.

## Error Handling

If the `x ` parameter is not a number (numeric value) `Atanh()` function returns an `error `.
If there is no argument (`x` – input value) passes to the function, then the compiler will produce an `error`.

## Return Value of `Atanh()` Function in Go Language

`Atanh()` function will returns the inverse hyperbolic tangent of the given input(`x ` – parameter).

## GoLang `Atanh()` Function Example 1

```pckage main

import "fmt"
import "math"

func main() {
var x float64
x = math.Atanh(-1)
fmt.Println(x)
}
```

Output:
` -Inf `

## GoLang `Atanh()` Function Example 2

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Atanh(0)
fmt.Println(x)
}
```

Output:
` 0 `

## GoLang `Atanh() ` Function Example 3

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Atanh(8)
fmt.Println(x)
}
```

Output:
` NaN `