The Potato is a crop that can be planted and harvested to obtain food. It can be found in village farms or by killing zombies that occasionally drop them. Once collected, it can be eaten to restore hunger points, or cooked in a furnace to create a baked potato, which provides greater hunger restoration. Additionally, it can be used to breed pigs or crafted into a poisonous potato, which has a chance to occur when harvesting.
The numerical item ID for Potato is 392
Numerical item IDs will only work in Minecraft versions below 1.13.
The item ID for Potato is minecraft:potato
This is the spawn command to give yourself Potato in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give