Primary cells are those cells which cannot be recharged and a dry cell is an example of a primary cell.
A Leclanche cell is a primary cell that converts chemical energy into electrical energy.
A Leclanche cell uses a carbon rod as an anode and zinc as the cathode.
A dry cell is packed with a limited amount of chemicals whose chemical reactions produce an electric current.
As we keep on drawing energy from the Leclanche cell, the chemicals inside it are used up with time and the cell ultimately stops producing electricity.
Hence, the Leclanche cell is an example of a primary cell.