7.212 TANH — Hyperbolic tangent function

Description:

TANH(X) computes the hyperbolic tangent of X.

Standard:

Fortran 77 and later

Class:

Elemental function

Syntax:

X = TANH(X)

Arguments:

X	The type shall be REAL.

Return value:

The return value is of type REAL and 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
DTANH(X)	REAL(8) X	REAL(8)	Fortran 95 and later

See also:

ATANH