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8.240 TANH — Hyperbolic tangent function

Description:
TANH(X) computes the hyperbolic tangent of X.
Standard:
Fortran 77 and later, for a complex argument Fortran 2008 or later
Class:
Elemental function
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

See also:
ATANH