Places or replaces a single block.
/setblock[mode]
| Name | Required | Description |
|---|---|---|
| x y z | Yes | Target coordinates. |
| block | Yes | Block identifier. |
| mode | No | replace, destroy, or keep. |
/setblock ~ ~-1 ~ minecraft:redstone_block /setblock 0 64 0 minecraft:command_block
keep to place only if the space is empty.Block identifiers are namespaced in modern versions.