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### 8.19 ASINH — Inverse hyperbolic sine function

Description:
ASINH(X) computes the inverse hyperbolic sine of X.
Standard:
Fortran 2008 and later
Class:
Elemental function
Syntax:
RESULT = ASINH(X)
Arguments:

 X The type shall be REAL or COMPLEX.

Return value:
The return value is of the 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 \asinh(x) \leq \pi/2.
Example:
          PROGRAM test_asinh
REAL(8), DIMENSION(3) :: x = (/ -1.0, 0.0, 1.0 /)
WRITE (*,*) ASINH(x)
END PROGRAM


Specific names:

 Name Argument Return type Standard DASINH(X) REAL(8) X REAL(8) GNU extension.