what's the point of "n" in "vout"? getrawtransaction

what's the point of "n" in "vout"? getrawtransaction

It seems like "n" is the index, is that true? If that is the case, why is the "n" key necessary?

Since it's an array, couldn't you just use the array index? Seems redundant, but i'm sure there's a reason. Thanks

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