> Assuming I'm not misunderstanding your question Numbers are not passed by reference. It's a lazy example, that has the potential to confuse. I would agree w

> Assuming I'm not misunderstanding your question Numbers are not passed by reference. It's a lazy example, that has the potential to confuse. I would agree with the downvoters I'm being petty, but c'mon... it's the very first thing you read in your JavaScript guide & it's flawed.