{{alias}}( [out,] re, im )
    Evaluates the signum function of a complex number.

    Parameters
    ----------
    out: Array|TypedArray|Object (optional)
        Output array.

    re: number
        Real component.

    im: number
        Imaginary component.

    Returns
    -------
    out: Array|TypedArray|Object
        Function result.

    Examples
    --------
    > var out = {{alias}}( -4.2, 5.5 )
    [ -0.6069136033622302, 0.79476781392673 ]

    // Provide an output array:
    > out = new {{alias:@stdlib/array/float64}}( 2 );
    > var v = {{alias}}( out, -4.2, 5.5 )
    <Float64Array>[ -0.6069136033622302, 0.79476781392673 ]
    > var bool = ( v === out )
    true

    See Also
    --------