Platform and version requirements: JVM (1.2), JS (1.2), Native (1.2)
fun atanh(x: Double): Double
fun atanh(x: Float): Float

Computes the inverse hyperbolic tangent of the value x.

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

Special cases:

  • tanh(NaN) is NaN
  • tanh(x) is NaN when x > 1 or x < -1
  • tanh(1.0) is +Inf
  • tanh(-1.0) is -Inf

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