Set Item Stack Size

Use Set Item Stack Size with the ordered inputs below.

Where to find it

Set Variable → Operations → Choose Operation → Item. Requires Dev access to configure, then a successful compile to activate.

Inputs

Input	Type	Role	Requirement	Default / constraint
Result	Item	Variable binding	Required	Required
Item	Item	Value	Required	Required
Amount	Number	Value	Required	Required

Result and behavior

Stores the result in the first configured destination Variable. Its type must match the result and any generic element/key types.

Configuration example

Block: Set Variable → Operations
Operation: Set Item Stack Size
Result: Private Item result
Item: Stone
Amount: 1

Use this as an editor configuration: declare any Variables/collections first and choose real locations/eligible targets for your plot. It is not pasteable source code.

Restrictions and troubleshooting

Item transformations copy their source metadata. For optional Item to Change, omission uses the current destination Item, which must already be assigned. An Item output does not automatically replace a player’s held stack; use a suitable inventory action afterward.

Runtime validation: Choose a non-Air item.

Runtime validation: Choose a valid item material ID.

Related guides

Editor · Arguments · Targets · Expressions · Native behavior

Reference identifier: item.set_amount.