Bernoulli's principle is a fundamental concept in fluid dynamics, stating that for an inviscid, incompressible fluid flowing in a steady streamline, an increase in the fluid's velocity occurs simultaneously with a decrease in its pressure. This relationship is crucial for understanding phenomena ranging from the lift generated by airfoils to the function of certain pumps and flow restrictors. Mathematically, the principle is derived from the conservation of energy, equating the total energy of the flowing fluid—which is comprised of pressure energy, kinetic energy, and potential energy—to a constant value along a streamline.