Rummy is a group of matching-card games notable for similar gameplay based on matching
cards of the same rank or sequence and same suit. The basic goal in any form of rummy is
to build melds which can be either sets (three or four of a kind of the same rank) or
runs (three or more sequential cards of the same suit). If a player discards a card,
making a run in the discard pile, it may not be taken up without taking all cards below
the top one.
Poker is a family of comparing card games in which players wager over which hand is best
according to that specific game's rules in ways similar to these rankings. While the
earliest known form of the game was played with just 20 cards, today it is usually
played with a standard deck, although in countries where short packs are common, it may
be played with 32, 40 or 48 cards. Thus poker games vary in deck configuration, the
number of cards in play, the number dealt face up or face down, and the number shared by
all players, but all have rules that involve one or more rounds of betting.