scoreboard()
Syntax
scoreboard()
scoreboard(objective)
scoreboard(objective, key)
scoreboard(objective, key, value)
Displays or modifies individual scoreboard values. With no arguments, returns
the list of current objectives. With specified objective, lists all keys
(players) associated with current objective, or null if objective does not
exist. With specified objective and key, returns current value of the
objective for a given player (key). With additional value sets a new
scoreboard value, returning previous value associated with the key. If the
value is null, resets the scoreboard value.