A body floats in a liquid when the buoyant force is :

According to Archimedes' principle, a body floats in equilibrium in a liquid when the upward buoyant force exerted by the liquid equals the downward weight of the body. If the buoyant force is less than its weight, the body sinks; if more, the body rises until it floats with only part of it submerged so that buoyancy again equals weight. Zero buoyancy would mean no upward force at all, and the body would sink. Hence the correct condition for floating is buoyant force equal to the body's weight.