Please explain this entry(what does it stand for) and why do you need a reference to InventoryItem in the loop ? [IMG_20240213_205120]

Yes. A reference is like an alias, if you modify the original variable it will also be reflected in it and vice versa since it reads from the same place. In the image of your first post a * was used, this is for a pointer. const ensures it cannot be modified, only copied from. if you remove it and …