How do you get multiple points on a minecraft scoreboard when you kill someone?

Question

For an example, let's say Player 1 and Player 2 are fighting, and Player 1 kills Player 2. Now Player 1 gets 10 coins on a scoreboard.

Answer 1

Your best bet would be to check whether their kill count has changed, then add accordingly. You can do this by creating a scoreboard of type dummy (we'll call it "oldKills") that you'll compare to your playerKillCount score ("newKills"); if oldKills is less than newKills, this means a new kill was landed, and you then add 10 to whatever your points/coins count is.