What do seeds do in the game "Minecraft?"?

"Minecraft" makes use of seeds or unique codes for creating the game world. Players can use the same seeds to create identical worlds. Seeds may also refer to the in-game items that let players grow plants.

By default, "Minecraft" generates a seed code based on the computer clock's current settings and uses this code to create a unique world. Players who like the features found in particular worlds may save the seed codes for future re-creation of these worlds. Seeds that players use for planting grow into a variety of plants, such as melons, pumpkins and wheat. Some of these plants produce food and materials that players can exchange for profit and other materials.