9.256 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