TANH — Hyperbolic tangent function

Description

TANH(X) computes the hyperbolic tangent of X.

Syntax

X = TANH(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. If X is REAL, the return value lies in the range - 1 \leq tanh(x) \leq 1 .

Example



program test_tanh

  real(8) :: x = 2.1_8

  x = tanh(x)

end program test_tanh

Specific names

Name Argument Return type Standard
TANH(X) REAL(4) X REAL(4) Fortran 95 and later
DTANH(X) REAL(8) X REAL(8) Fortran 95 and later

Standard

Fortran 77 and later, for a complex argument Fortran 2008 or later

Class

Elemental function

Name	Argument	Return type	Standard
`TANH(X)`	`REAL(4) X`	`REAL(4)`	Fortran 95 and later
`DTANH(X)`	`REAL(8) X`	`REAL(8)`	Fortran 95 and later