# Atanh

Computes inverse hyperbolic tangent of vector elements.

## Syntax

Fortran:

call vsatanh( n, a, y )

call vdatanh( n, a, y )

call vcatanh( n, a, y )

call vzatanh( n, a, y )

C:

vsAtanh( n, a, y );

vdAtanh( n, a, y );

vcAtanh( n, a, y );

vzAtanh( n, a, y );

## Input Parameters

Name | Type | Description
--- | --- | ---
n | FORTRAN: INTEGER, INTENT(IN) C: int | Specifies the number of elements to be calculated.
a | FORTRAN: REAL, INTENT(IN) for vsatanh DOUBLE PRECISION, INTENT(IN) for vdatanh COMPLEX, INTENT(IN) for vcatanh DOUBLE COMPLEX, INTENT(IN) for vzatanh C: const float* for vsAtanh const double* for vdAtanh const MKL_Complex8* for vcAtanh const MKL_Complex16* for vzAtanh | FORTRAN: Array, specifies the input vector a. C: Pointer to an array that contains the input vector a.

## Output Parameters

Name | Type | Description
--- | --- | ---
y | FORTRAN: REAL for vsatanh DOUBLE PRECISION for vdatanh COMPLEX for vcatanh DOUBLE COMPLEX for vzatanh C: float* for vsAtanh double* for vdAtanh MKL_Complex8* for vcAtanh MKL_Complex16* for vzAtanh | FORTRAN: Array, specifies the output vector y. C: Pointer to an array that contains the output vector y.

Parent topic: Hyperbolic Functions