[prog] python question. Re modulus operator and a few other things.

[Guru -]

Ok, this is something I don't understand, taken from How to think Like a 
computer scientist python edition. This is only part of a larger section of 
methods for the Deck class...
"
class Deck :
  def deal(self, hands, nCards=999):
    nHands = len(hands)
    for i in range(nCards):
      if self.isEmpty(): break    # break if out of cards
      card = self.popCard()       # take the top card
      hand = hands[i % nHands]    # whose turn is next?
      hand.addCard(card)          # add the card to the hand
"
"The second parameter, nCards, is optional; the default is a large number, 
which effectively means that all of the cards in the deck will get dealt."
Well that makes sense...

"The loop variable i goes from 0 to nCards-1. Each time through the loop, a 
card is removed from the deck using the list method pop, which removes and 
returns the last item in the list."
That also makes sense...

"The modulus operator (%) allows us to deal cards in a round robin (one card 
at a time to each hand). When i is equal to the number of hands in the list, 
the expression i % nHands wraps around to the beginning of the list (index 
0). "
I don't understand how this would work. Wouldn't i % nCards find the 
remainder of i (which would start at 0 correct?), but that would be 1 / 999 
and the first 20 rounds would be dealing to the same person...
how would that work?




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