{{alias}}( x )
    Computes the hyperbolic tangent of a number.

    Parameters
    ----------
    x: number
        Input value (in radians).

    Returns
    -------
    y: number
        Hyperbolic tangent.

    Examples
    --------
    > var y = {{alias}}( 0.0 )
    0.0
    > var y = {{alias}}( -0.0 )
    -0.0
    > y = {{alias}}( 2.0 )
    ~0.964
    > y = {{alias}}( -2.0 )
    ~-0.964
    > y = {{alias}}( NaN )
    NaN

    See Also
    --------