DefinitionIntegration is a mathematical technique that simply collects the quantities, for example areas under curve, total distance covered, accumulated quantities in an interval. The two chief types are the definite integral, which represents a number, and the indefinite integral, which represents a function (the antiderivative of the given function). Calculus is the study of integrals and is essential for solving physics, engineering, economics ans many other problems. Where The definite integral ∫abf(x)dx denotes the area between curve f(x) from x=a to x=b.