How to check if prefab exists?

I want to find out how to find if a prefab exists at a specific coordinate, then state what it was, at runtime. I’m making a chunk system for a Minecraft clone, for my sister.

this question already got answered:

If I understand your question correctly, you could simply check whether the x and z positions are the same of that of the coordinate. For example

if(yourObject.transform.position.x == coordinate.x && yourObject.transform.position.z == coordinate.z)
{
// Your code here
}

There are other more efficient ways about this but this is something quick I came up with to hopefully get you on the right track.