atanh()

The atanh() method in Kotlin’s math class returns the inverse hyperbolic tangent of any number between -1.0 and 1.0 in radians.

Syntax

import kotlin.math.*
val y = atanh(x)

• x: A number between -1.0 and 1.0, of type Double or Float.

Special Cases:

• atanh(NaN) = NaN
• atanh(x) = NaN if x > 1 || x < -1
• atanh(1.0) = +Inf
• atanh(-1.0) = -Inf

Example

The following code is a basic implementation of math.atanh(x).

import kotlin.math.*
fun main() {
  val x = -0.1
  val y = atanh(x)

  // Print results
  println(y)
}

It will output:

-0.100335348

The returned value is y such that tanh(y) == x.