A cylinder has zero corners.
A cylinder is a three-dimensional geometric shape with two parallel circular bases connected by a curved surface. Corners, also known as vertices, are points where edges or lines meet. Since a cylinder's bases are circles (which have no corners), and its side is a smooth, curved surface (also with no corners), it has no corners at all.
Think of a can of soup or a drinking glass (without any facets or edges). These are everyday examples of cylinders. You won't find any sharp corners or points on these objects.
Therefore, the answer remains firmly at zero.
