DefinitionDifferential equations are equations that express the relationship between the function in some variable and any of its derivatives. There are many methods and algorithms for solving the differential equations, such as separation of the variables and the integrating factor and a power series solution. There are also numerical methods for solving the differential equation, such as the Eulers method, Runge-Kutta method, and finite differences. These solvers are an essential tool in physics, engineering, and real-world modeling, as they allow us to predict the behavior of dynamical systems. For example, we can solve the first-order ordinary differential equation by integral both sides of it and then evaluate the constant of intergraion to get.