Minecraft wiki entry for stats, associated text: Commands can be executed by blocks (specifically, command blocks and signs) or by entities (players can execute commands directly, and other entities can be the origin of commands indirectly with the /execute command). When a command is executed, the command returns one or more "command stats": the success count, number of blocks affected, number of entities affected, number of items affected, and/or a query result (such as from /time query daytime).