Er, the lottery is gambling. With even less chance of winning than usual. Particularly the Euromillions. Which is why it often goes for weeks without anyone winning. Despite two draws a week.
Ummm - I think I knew that when I wrote...
Re. EuroM: but eventually, somebody always does win, and the money rolls over until they do, and it's as easy or difficult to pěck seven numbers on one gamble as on any other. It's pure chance. The prize is bigger due to more contributed cash, and the win size, actual money won in any grouping, will depend on the number of others lucky within that same grouping too; if only one guy gets the lucky set of digits he wins the lot, if more than one get the same set of numbers they share the prize.
And it runs right down to two numbers, which I've had a few times; even made three now and then, but it's just peanuts at that level - cups of java.