{{alias}}( x )
    Computes the normalized cardinal sine of a number.

    Parameters
    ----------
    x: number
        Input value.

    Returns
    -------
    y: number
        Cardinal sine.

    Examples
    --------
    > var y = {{alias}}( 0.5 )
    ~0.637
    > y = {{alias}}( -1.2 )
    ~-0.156
    > y = {{alias}}( 0.0 )
    1.0
    > y = {{alias}}( NaN )
    NaN

    See Also
    --------