ATANH — Inverse hyperbolic tangent function

Description

ATANH(X) computes the inverse hyperbolic tangent of X.

Syntax

RESULT = ATANH(X)

Arguments

X The type shall be REAL or COMPLEX.

Return value

The return value has same type and kind as X. If X is complex, the imaginary part of the result is in radians and lies between -\pi/2 \leq \Im \atanh(x) \leq \pi/2.

Example



PROGRAM test_atanh

  REAL, DIMENSION(3) :: x = (/ -1.0, 0.0, 1.0 /)

  WRITE (*,*) ATANH(x)

END PROGRAM

Specific names

Name Argument Return type Standard
DATANH(X) REAL(8) X REAL(8) GNU extension

Standard

Fortran 2008 and later

Class

Elemental function

Name	Argument	Return type	Standard
`DATANH(X)`	`REAL(8) X`	`REAL(8)`	GNU extension