/trigger

{
 "title": "<code>/trigger</code>",
 "rows": [
 {
 "field": "0",
 "label": "(link to Permission level article, displayed as Permission level<br>required)"
 },
 {
 "field": "None",
 "label": "(link to Commands#Restrictions article, displayed as Restrictions)"
 }
 ],
 "invimages": [],
 "images": []
}

Changes the executor player's score in a scoreboard objective with a "trigger" criterion, and un-enables the objective for this player. Allows non-operator players to modify their own scoreboard objectives under tightly controlled conditions. Often used to let players activate systems controlled by data packs or command blocks.

trigger <objective>

Adds 1 to the current value of <objective>.

trigger <objective> add <value>

Adds <value> to the current value of <objective>.

trigger <objective> set <value>

Sets the value of <objective> to <value>.

<objective>: objective

An enabled scoreboard objective with the "trigger" criterion.

It must be a single word. (Allowed characters include: -, +, ., _, A-Z, a-z, and 0-9) It resolves into a scoreboard objective during command execution.

<value>: integer

Specifies the value to be set to or added to the objective.

Must be a [Int]32-bit integer number (from -2147483648 (-2³¹) to 2147483647 (2³¹-1) ).