The scoreboard is the sidebar shown on the right side of the player's screen. The scoreboard is made of a title and 1 to 15 lines of text. If there are no values (the 1-15 lines of text), then the scoreboard won't be shown.
The values can only be a maximum of 42 characters long (color codes included).
Commonly used methods
The scoreboard won't be shown if it is empty.
Giving the player a scoreboard
Checking if the player has a scoreboard already
Removing scoreboard from player
The scoreboard title can only be a maximum of 32 characters long (color codes included).
Setting the title
api.setScoreboardTitle(player, "My title");
api.setScoreboardTitleWithPlaceholders(player, "My title");
Getting the title
The index is a number from 1 to 15 inclusive.
Setting without placeholders
api.setScoreboardValue(player, index, "My value");
api.setScoreboardValueWithPlaceholders(player, 1, "My value");
Getting a value at a given index
Removing a value at a given index