ATANH — Inverse hyperbolic tangent function¶

ATANH(X)¶

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

Parameters: X – The type shall be REAL or COMPLEX.
Returns: 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.

Syntax:

RESULT = ATANH(X)

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

See also:

Inverse function: TANH