I'm on page 121, simulating private methods, JavaScript, Programmer's Reference, and I was just wondering if the parentheses on line 7 before the function is imperative. Is it just for illustrative purposes? I'm just curious because the code runs both ways, with and without the parentheses.

I'm new to this, but I'm grasping on to the concepts pretty fast, but just so I completely understand the style and not get lost, I was just curious about this one thing.

Thank you.

That's a fairly technical question about what's really going on inside Javascript, so I'm not sure. But when in doubt I do exactly what you did. Test it.

Based on the results, a good working answer is that they're not required. ;)

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